The cause of the extinction of dinosaurs 65 million years ago is currently debated. Some attribute the extinction to volcanic activity while others attribute it to asteroid or comet impact. Two scientists offer conflicting viewpoints on the most probable cause of the mass extinction.Scientist AThe extinction of dinosaurs was most likely caused by the impact of an asteroid or large comet. Unusually high levels of the rare metal iridium (found in extraterrestrial material) have been discovered in a layer of clay deposited at just the time of the extinction. In addition, this layer of clay contained quartz grains with a crystal structure that has been distorted by exceedingly high pressures (almost certainly caused by an impact). This colossal impact brought about a period of severe cooling that affected dinosaur eggs rather than adult dinosaurs. Small reptiles could survive by protecting their minute eggs in a variety of ways. However, there was no way for dinosaurs to protect their large eggs against a quickly-changing climate.Scientist BThe extinction of dinosaurs was most likely caused by a volcanic outburst. In general, volcanic eruptions can have potent effects on climate. In 1815 the volcano Tambora in Indonesia erupted, spreading a pall of dust around the globe that resulted in killing frosts around Europe. The much larger eruption that formed the Deccan basalts about 65 million years ago would have caused a deeper and more prolonged cooling that directly affected adult dinosaurs. The rare metal iridium has been found both in active volcanoes and in a layer of clay deposited around the time of the dinosaur extinction. Therefore the dinosaurs were most likely affected by a massive volcanic eruption.Q. With which of the following statements are both scientists most likely to agree?a)Massive climate change primarily affected adult dinosaursb)Massive climate change played a key role in the extinctionc)Massive climate change primarily affected dinosaur eggsd)An extraterrestrial object brought about climate change 65 million years agoCorrect answer is option 'B'. Can you explain this answer?

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Scientist A

The extinction of dinosaurs was most likely caused by the impact of an asteroid or large comet. Unusually high levels of the rare metal iridium (found in extraterrestrial material) have been discovered in a layer of clay deposited at just the time of the extinction. In addition, this layer of clay contained quartz grains with a crystal structure that has been distorted by exceedingly high pressures (almost certainly caused by an impact). This colossal impact brought about a period of severe cooling that affected dinosaur eggs rather than adult dinosaurs. Small reptiles could survive by protecting their minute eggs in a variety of ways. However, there was no way for dinosaurs to protect their large eggs against a quickly-changing climate.

Scientist B

The extinction of dinosaurs was most likely caused by a volcanic outburst. In general, volcanic eruptions can have potent effects on climate. In 1815 the volcano Tambora in Indonesia erupted, spreading a pall of dust around the globe that resulted in killing frosts around Europe. The much larger eruption that formed the Deccan basalts about 65 million years ago would have caused a deeper and more prolonged cooling that directly affected adult dinosaurs. The rare metal iridium has been found both in active volcanoes and in a layer of clay deposited around the time of the dinosaur extinction. Therefore the dinosaurs were most likely affected by a massive volcanic eruption.

Q. With which of the following statements are both scientists most likely to agree?

a)
Massive climate change primarily affected adult dinosaurs
b)
Massive climate change played a key role in the extinction
c)
Massive climate change primarily affected dinosaur eggs
d)
An extraterrestrial object brought about climate change 65 million years ago

Correct answer is option 'B'. Can you explain this answer?

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The cause of the extinction of dinosaurs 65 million years ago is curre...

Scientist A believes that an extraterrestrial object was responsible for the massive climate change, whereas Scientist B attributes the change to a volcanic eruption. Both scientists agree, however, that climate change led to the mass extinction. Scientist A believes that climate change affected dinosaur eggs while Scientist B believes climate change affected adult dinosaurs.

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The cause of the extinction of dinosaurs 65 million years ago is currently debated. Some attribute the extinction to volcanic activity while others attribute it to asteroid or comet impact. Two scientists offer conflicting viewpoints on the most probable cause of the mass extinction.Scientist AThe extinction of dinosaurs was most likely caused by the impact of an asteroid or large comet. Unusually high levels of the rare metal iridium (found in extraterrestrial material) have been discovered in a layer of clay deposited at just the time of the extinction. In addition, this layer of clay contained quartz grains with a crystal structure that has been distorted by exceedingly high pressures (almost certainly caused by an impact). This colossal impact brought about a period of severe cooling that affected dinosaur eggs rather than adult dinosaurs. Small reptiles could survive by protecting their minute eggs in a variety of ways. However, there was no way for dinosaurs to protect their large eggs against a quickly-changing climate.Scientist BThe extinction of dinosaurs was most likely caused by a volcanic outburst. In general, volcanic eruptions can have potent effects on climate. In 1815 the volcano Tambora in Indonesia erupted, spreading a pall of dust around the globe that resulted in killing frosts around Europe. The much larger eruption that formed the Deccan basalts about 65 million years ago would have caused a deeper and more prolonged cooling that directly affected adult dinosaurs. The rare metal iridium has been found both in active volcanoes and in a layer of clay deposited around the time of the dinosaur extinction. Therefore the dinosaurs were most likely affected by a massive volcanic eruption.Nowadays, various natural phenomena can produce clouds of dust that spread over large areas. Based on the information in the passage, Scientist B would most likely predict which of the following outcomes near these affected areas?

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In its refined form, iron is a shiny, silver-gray metal; however, when refined iron is exposed to atmospheric conditions for an extended period of time, its surface becomes flaky, pitted, and red- or orange-colored. This process is known as "rusting," and the new flaky, orange or red substance is called "rust."Below, two scientists discuss how rust forms and the composition of rust.Scientist 1:Both water and oxygen are needed for rust to form. Water is an electrolyte, meaning that it allows ions to move within it. When iron comes into contact with water, some iron naturally dissociates into iron ions (Fe2+) and free electrons. Additionally, when atmospheric oxygen (O2) dissolves in water, some oxygen reacts with water to form hydroxide ions (OH-). Because water allows ions to move freely, iron ions and hydroxide ions combine to form a new compound: iron hydroxide. However, iron hydroxide is not a stable compound. Over time, as water evaporates, it changes into a hydrated form of iron oxide. This is rust.Salts can act as catalysts for rust formation, meaning that they speed up the rate at which rust forms. However, rust can form in pure water, in the absence of added salts.Increasing the ambient temperature increases the rate of rust formation. Additionally, increasing the amount of irons surface area that is exposed to water also increases the rate at which rust forms. However, because a layer of rust is porous to water and oxygen, water and oxygen will continue to cause the interior of a piece of iron to rust even after the irons surface has been rusted.Scientist 2:Attack by acids causes rust to form. In water, acids ionize to create positively-charged hydronium (H+) ions and negatively-charged anions. Hydronium ions are electron-deficient; because of this, they attract electrons from iron. This creates iron ions (Fe2+), which are soluble in water. Once dissolved in water, iron ions react with dissolved atmospheric oxygen (O2) to create iron oxide, or rust.Acids can come from a variety of sources. For example, when carbon dioxide in the atmosphere dissolves in water, carbonic acid (H2CO3) is created. Carbonic acid is the most common cause of rusting. However, other environmental sources of acids exist. Rainwater is normally slightly acidic because it has come into contact with molecules in the atmosphere, like sulfur dioxide and nitrogen oxides. These molecules also dissolve in water to form acids. Additionally, iron itself may contain impurities such as phosphorous and sulfur, which react with water to produce acids. Both acidic environments and impurities within iron itself create the conditions under which iron rusts.Rusting can be prevented by painting the surface of iron, thus preventing it from coming into contact with water, oxygen, and acids. Iron can also be protected in a process called "galvanizing," which involves coating iron in a thin layer of zinc. Because zinc is more reactive than iron, it is corroded while the iron is protected.Boiling water does not contain dissolved oxygen. Suppose that a new piece of iron is immersed in boiling water for an extended period of time. Afterwards, scientists observe that the iron has rusted. How would this affect the arguments of Scientist 1 and Scientist 2?

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Directions:Read the passages and choose the best answer to each question.PassageThe Earth’s magnetic ﬁeld is one of its most signiﬁcant natural phenomena. For centuries, the ﬁeld has been used to aid navigation and exploration, and has been vital to many major discoveries. The magnetic ﬁeld of the Earth extends several thousands of miles into space. It has the effect of shielding the Earth from solar wind, protecting the planet from dangerous high-energy particles and radiation. The exact source of the Earth’s magnetic ﬁeld is not certain. The following two Scientists attempt to explain the phenomenon.Scientist 1The Earth’s magnetic ﬁeld is similar to that of a bar magnet tilted 11 degrees from the spin axis of the Earth.The magnetic ﬁeld of a bar magnet, or any other type of permanent magnet, is created by the coordinated motions of electrons within iron atoms. It is widely accepted that the Earth’s core consists of metals. The inner core is 70% as wide as the moon and consists of a solid iron ball, which would exhibit properties of ferromagnetism (the natural magnetic tendency of iron). The core has its own rotation and is surrounded by a “sea” of molten rock. The magnetic ﬁeld grows and wanes, and the Earth’s poles drift and occasionally ﬂip as the rotation of the core changes. The poles of the magnetic ﬁeld have “ﬂipped” many times due to the ﬂuctuations in the rotation of the solid inner core. Other ﬂuctuations in the magnetic ﬁeld that can occur on a daily basis are largely the result of interference by solar wind.Scientist 2The Earth’s magnetic ﬁeld is attributed to a dynamo effect of circulating electric current in the molten outer core. Electric currents cause magnetic ﬁelds; therefore, the circulating electric currents in the Earth’s molten metallic core are the origin of the magnetic ﬁeld. When conducting ﬂuid ﬂows across an existing magnetic ﬁeld, electric currents are induced, creating another magnetic ﬁeld. When this magnetic ﬁeld reinforces the original magnetic ﬁeld, a dynamo is created which sustains itself.Sitting atop the hot, iron inner core, the Earth’s molten outer core churns and moves. The outer core also has cyclones or whirlpools powered by the Coriolis effects of Earth’s rotation. These complex and unpredictable motions generate the ﬂuctuating magnetic ﬁeld. The outer core is seething, swirling, and turbulent, which has been detected by the constant changes and reversals in polarity throughout the planet’s history. Further, iron has a special characteristic.When it is hotter than 1043 K, its Curie temperature, iron loses its magnetic properties. Therefore the Earth’s magnetic ﬁeld is caused not by magnetised iron deposits, but mostly by electric currents in the liquid outer core.Q.A scientiﬁc article stated, “Since 1848, when the strength of the Earth’s magnetic ﬁeld was ﬁrst measured, the ﬁeld has lost 10% of its strength.” Which of the scientists’ viewpoints, if any, is (ar e) in agreement with this statement?

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Directions:Read the passages and choose the best answer to each question.PassageThe Earth’s magnetic ﬁeld is one of its most signiﬁcant natural phenomena. For centuries, the ﬁeld has been used to aid navigation and exploration, and has been vital to many major discoveries. The magnetic ﬁeld of the Earth extends several thousands of miles into space. It has the effect of shielding the Earth from solar wind, protecting the planet from dangerous high-energy particles and radiation. The exact source of the Earth’s magnetic ﬁeld is not certain. The following two Scientists attempt to explain the phenomenon.Scientist 1The Earth’s magnetic ﬁeld is similar to that of a bar magnet tilted 11 degrees from the spin axis of the Earth.The magnetic ﬁeld of a bar magnet, or any other type of permanent magnet, is created by the coordinated motions of electrons within iron atoms. It is widely accepted that the Earth’s core consists of metals. The inner core is 70% as wide as the moon and consists of a solid iron ball, which would exhibit properties of ferromagnetism (the natural magnetic tendency of iron). The core has its own rotation and is surrounded by a “sea” of molten rock. The magnetic ﬁeld grows and wanes, and the Earth’s poles drift and occasionally ﬂip as the rotation of the core changes. The poles of the magnetic ﬁeld have “ﬂipped” many times due to the ﬂuctuations in the rotation of the solid inner core. Other ﬂuctuations in the magnetic ﬁeld that can occur on a daily basis are largely the result of interference by solar wind.Scientist 2The Earth’s magnetic ﬁeld is attributed to a dynamo effect of circulating electric current in the molten outer core. Electric currents cause magnetic ﬁelds; therefore, the circulating electric currents in the Earth’s molten metallic core are the origin of the magnetic ﬁeld. When conducting ﬂuid ﬂows across an existing magnetic ﬁeld, electric currents are induced, creating another magnetic ﬁeld. When this magnetic ﬁeld reinforces the original magnetic ﬁeld, a dynamo is created which sustains itself.Sitting atop the hot, iron inner core, the Earth’s molten outer core churns and moves. The outer core also has cyclones or whirlpools powered by the Coriolis effects of Earth’s rotation. These complex and unpredictable motions generate the ﬂuctuating magnetic ﬁeld. The outer core is seething, swirling, and turbulent, which has been detected by the constant changes and reversals in polarity throughout the planet’s history. Further, iron has a special characteristic.When it is hotter than 1043 K, its Curie temperature, iron loses its magnetic properties. Therefore the Earth’s magnetic ﬁeld is caused not by magnetised iron deposits, but mostly by electric currents in the liquid outer core.Q.Do the Scientists differ in their description of the Earth’s magnetic ﬁeld?

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Before modern technologies and experiments allowed scientists to understand different organisms mechanisms of reproduction, numerous theories existed about how populations came to exist. Two scientists from the 1800s describe their theories. Here are their arguments.Scientist IJust like some plants come from seeds and others are capable of vegetative (asexual) reproduction, some animal organisms come from non-sexual reproduction as well. Maggots, for example, appear on rotting carcasses. It is clearly illogical to suggest that the dead animal created or gave birth to the maggots, as it is no longer alive and is therefore incapable of sexual reproduction. The only rational conclusion for the appearance of maggots is a spontaneous generation. This is similar to how, if one were to leave a bowl of broth in the open air for a week, it would turn cloudy from bacteria appearing in the liquid.Scientist IIAnimate objects cannot arise from inanimate objects. Even when plants perform asexual reproduction, daughter plants are still coming from parent plants. There is no other example in nature of a living organism spontaneously coming into being. It is true that we observe maggots on rotting carcasses, but that does not necessarily mean that the maggots came from the rotting carcass. Similarly, bacteria growing in broth do not necessarily come directly from the broth. If a living organism appears, then it must have come from another animate object, even if we did not witness it. It is more likely that these invisible organisms have come in through the air and we simply do not see them until they have had a chance to replicate in these locations.Which of the following is a valid summary of Scientist IIs argument against Scientist I?

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The cause of the extinction of dinosaurs 65 million years ago is currently debated. Some attribute the extinction to volcanic activity while others attribute it to asteroid or comet impact. Two scientists offer conflicting viewpoints on the most probable cause of the mass extinction.Scientist AThe extinction of dinosaurs was most likely caused by the impact of an asteroid or large comet. Unusually high levels of the rare metal iridium (found in extraterrestrial material) have been discovered in a layer of clay deposited at just the time of the extinction. In addition, this layer of clay contained quartz grains with a crystal structure that has been distorted by exceedingly high pressures (almost certainly caused by an impact). This colossal impact brought about a period of severe cooling that affected dinosaur eggs rather than adult dinosaurs. Small reptiles could survive by protecting their minute eggs in a variety of ways. However, there was no way for dinosaurs to protect their large eggs against a quickly-changing climate.Scientist BThe extinction of dinosaurs was most likely caused by a volcanic outburst. In general, volcanic eruptions can have potent effects on climate. In 1815 the volcano Tambora in Indonesia erupted, spreading a pall of dust around the globe that resulted in killing frosts around Europe. The much larger eruption that formed the Deccan basalts about 65 million years ago would have caused a deeper and more prolonged cooling that directly affected adult dinosaurs. The rare metal iridium has been found both in active volcanoes and in a layer of clay deposited around the time of the dinosaur extinction. Therefore the dinosaurs were most likely affected by a massive volcanic eruption.Q. With which of the following statements are both scientists most likely to agree?a)Massive climate change primarily affected adult dinosaursb)Massive climate change played a key role in the extinctionc)Massive climate change primarily affected dinosaur eggsd)An extraterrestrial object brought about climate change 65 million years agoCorrect answer is option 'B'. Can you explain this answer?

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The cause of the extinction of dinosaurs 65 million years ago is currently debated. Some attribute the extinction to volcanic activity while others attribute it to asteroid or comet impact. Two scientists offer conflicting viewpoints on the most probable cause of the mass extinction.Scientist AThe extinction of dinosaurs was most likely caused by the impact of an asteroid or large comet. Unusually high levels of the rare metal iridium (found in extraterrestrial material) have been discovered in a layer of clay deposited at just the time of the extinction. In addition, this layer of clay contained quartz grains with a crystal structure that has been distorted by exceedingly high pressures (almost certainly caused by an impact). This colossal impact brought about a period of severe cooling that affected dinosaur eggs rather than adult dinosaurs. Small reptiles could survive by protecting their minute eggs in a variety of ways. However, there was no way for dinosaurs to protect their large eggs against a quickly-changing climate.Scientist BThe extinction of dinosaurs was most likely caused by a volcanic outburst. In general, volcanic eruptions can have potent effects on climate. In 1815 the volcano Tambora in Indonesia erupted, spreading a pall of dust around the globe that resulted in killing frosts around Europe. The much larger eruption that formed the Deccan basalts about 65 million years ago would have caused a deeper and more prolonged cooling that directly affected adult dinosaurs. The rare metal iridium has been found both in active volcanoes and in a layer of clay deposited around the time of the dinosaur extinction. Therefore the dinosaurs were most likely affected by a massive volcanic eruption.Q. With which of the following statements are both scientists most likely to agree?a)Massive climate change primarily affected adult dinosaursb)Massive climate change played a key role in the extinctionc)Massive climate change primarily affected dinosaur eggsd)An extraterrestrial object brought about climate change 65 million years agoCorrect answer is option 'B'. Can you explain this answer? for ACT 2025 is part of ACT preparation. The Question and answers have been prepared according to the ACT exam syllabus. Information about The cause of the extinction of dinosaurs 65 million years ago is currently debated. Some attribute the extinction to volcanic activity while others attribute it to asteroid or comet impact. Two scientists offer conflicting viewpoints on the most probable cause of the mass extinction.Scientist AThe extinction of dinosaurs was most likely caused by the impact of an asteroid or large comet. Unusually high levels of the rare metal iridium (found in extraterrestrial material) have been discovered in a layer of clay deposited at just the time of the extinction. In addition, this layer of clay contained quartz grains with a crystal structure that has been distorted by exceedingly high pressures (almost certainly caused by an impact). This colossal impact brought about a period of severe cooling that affected dinosaur eggs rather than adult dinosaurs. Small reptiles could survive by protecting their minute eggs in a variety of ways. However, there was no way for dinosaurs to protect their large eggs against a quickly-changing climate.Scientist BThe extinction of dinosaurs was most likely caused by a volcanic outburst. In general, volcanic eruptions can have potent effects on climate. In 1815 the volcano Tambora in Indonesia erupted, spreading a pall of dust around the globe that resulted in killing frosts around Europe. The much larger eruption that formed the Deccan basalts about 65 million years ago would have caused a deeper and more prolonged cooling that directly affected adult dinosaurs. The rare metal iridium has been found both in active volcanoes and in a layer of clay deposited around the time of the dinosaur extinction. Therefore the dinosaurs were most likely affected by a massive volcanic eruption.Q. With which of the following statements are both scientists most likely to agree?a)Massive climate change primarily affected adult dinosaursb)Massive climate change played a key role in the extinctionc)Massive climate change primarily affected dinosaur eggsd)An extraterrestrial object brought about climate change 65 million years agoCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for ACT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The cause of the extinction of dinosaurs 65 million years ago is currently debated. Some attribute the extinction to volcanic activity while others attribute it to asteroid or comet impact. Two scientists offer conflicting viewpoints on the most probable cause of the mass extinction.Scientist AThe extinction of dinosaurs was most likely caused by the impact of an asteroid or large comet. Unusually high levels of the rare metal iridium (found in extraterrestrial material) have been discovered in a layer of clay deposited at just the time of the extinction. In addition, this layer of clay contained quartz grains with a crystal structure that has been distorted by exceedingly high pressures (almost certainly caused by an impact). This colossal impact brought about a period of severe cooling that affected dinosaur eggs rather than adult dinosaurs. Small reptiles could survive by protecting their minute eggs in a variety of ways. However, there was no way for dinosaurs to protect their large eggs against a quickly-changing climate.Scientist BThe extinction of dinosaurs was most likely caused by a volcanic outburst. In general, volcanic eruptions can have potent effects on climate. In 1815 the volcano Tambora in Indonesia erupted, spreading a pall of dust around the globe that resulted in killing frosts around Europe. The much larger eruption that formed the Deccan basalts about 65 million years ago would have caused a deeper and more prolonged cooling that directly affected adult dinosaurs. The rare metal iridium has been found both in active volcanoes and in a layer of clay deposited around the time of the dinosaur extinction. Therefore the dinosaurs were most likely affected by a massive volcanic eruption.Q. With which of the following statements are both scientists most likely to agree?a)Massive climate change primarily affected adult dinosaursb)Massive climate change played a key role in the extinctionc)Massive climate change primarily affected dinosaur eggsd)An extraterrestrial object brought about climate change 65 million years agoCorrect answer is option 'B'. Can you explain this answer?.

Solutions for The cause of the extinction of dinosaurs 65 million years ago is currently debated. Some attribute the extinction to volcanic activity while others attribute it to asteroid or comet impact. Two scientists offer conflicting viewpoints on the most probable cause of the mass extinction.Scientist AThe extinction of dinosaurs was most likely caused by the impact of an asteroid or large comet. Unusually high levels of the rare metal iridium (found in extraterrestrial material) have been discovered in a layer of clay deposited at just the time of the extinction. In addition, this layer of clay contained quartz grains with a crystal structure that has been distorted by exceedingly high pressures (almost certainly caused by an impact). This colossal impact brought about a period of severe cooling that affected dinosaur eggs rather than adult dinosaurs. Small reptiles could survive by protecting their minute eggs in a variety of ways. However, there was no way for dinosaurs to protect their large eggs against a quickly-changing climate.Scientist BThe extinction of dinosaurs was most likely caused by a volcanic outburst. In general, volcanic eruptions can have potent effects on climate. In 1815 the volcano Tambora in Indonesia erupted, spreading a pall of dust around the globe that resulted in killing frosts around Europe. The much larger eruption that formed the Deccan basalts about 65 million years ago would have caused a deeper and more prolonged cooling that directly affected adult dinosaurs. The rare metal iridium has been found both in active volcanoes and in a layer of clay deposited around the time of the dinosaur extinction. Therefore the dinosaurs were most likely affected by a massive volcanic eruption.Q. With which of the following statements are both scientists most likely to agree?a)Massive climate change primarily affected adult dinosaursb)Massive climate change played a key role in the extinctionc)Massive climate change primarily affected dinosaur eggsd)An extraterrestrial object brought about climate change 65 million years agoCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for ACT. Download more important topics, notes, lectures and mock test series for ACT Exam by signing up for free.

Here you can find the meaning of The cause of the extinction of dinosaurs 65 million years ago is currently debated. Some attribute the extinction to volcanic activity while others attribute it to asteroid or comet impact. Two scientists offer conflicting viewpoints on the most probable cause of the mass extinction.Scientist AThe extinction of dinosaurs was most likely caused by the impact of an asteroid or large comet. Unusually high levels of the rare metal iridium (found in extraterrestrial material) have been discovered in a layer of clay deposited at just the time of the extinction. In addition, this layer of clay contained quartz grains with a crystal structure that has been distorted by exceedingly high pressures (almost certainly caused by an impact). This colossal impact brought about a period of severe cooling that affected dinosaur eggs rather than adult dinosaurs. Small reptiles could survive by protecting their minute eggs in a variety of ways. However, there was no way for dinosaurs to protect their large eggs against a quickly-changing climate.Scientist BThe extinction of dinosaurs was most likely caused by a volcanic outburst. In general, volcanic eruptions can have potent effects on climate. In 1815 the volcano Tambora in Indonesia erupted, spreading a pall of dust around the globe that resulted in killing frosts around Europe. The much larger eruption that formed the Deccan basalts about 65 million years ago would have caused a deeper and more prolonged cooling that directly affected adult dinosaurs. The rare metal iridium has been found both in active volcanoes and in a layer of clay deposited around the time of the dinosaur extinction. Therefore the dinosaurs were most likely affected by a massive volcanic eruption.Q. With which of the following statements are both scientists most likely to agree?a)Massive climate change primarily affected adult dinosaursb)Massive climate change played a key role in the extinctionc)Massive climate change primarily affected dinosaur eggsd)An extraterrestrial object brought about climate change 65 million years agoCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of The cause of the extinction of dinosaurs 65 million years ago is currently debated. Some attribute the extinction to volcanic activity while others attribute it to asteroid or comet impact. Two scientists offer conflicting viewpoints on the most probable cause of the mass extinction.Scientist AThe extinction of dinosaurs was most likely caused by the impact of an asteroid or large comet. Unusually high levels of the rare metal iridium (found in extraterrestrial material) have been discovered in a layer of clay deposited at just the time of the extinction. In addition, this layer of clay contained quartz grains with a crystal structure that has been distorted by exceedingly high pressures (almost certainly caused by an impact). This colossal impact brought about a period of severe cooling that affected dinosaur eggs rather than adult dinosaurs. Small reptiles could survive by protecting their minute eggs in a variety of ways. However, there was no way for dinosaurs to protect their large eggs against a quickly-changing climate.Scientist BThe extinction of dinosaurs was most likely caused by a volcanic outburst. In general, volcanic eruptions can have potent effects on climate. In 1815 the volcano Tambora in Indonesia erupted, spreading a pall of dust around the globe that resulted in killing frosts around Europe. The much larger eruption that formed the Deccan basalts about 65 million years ago would have caused a deeper and more prolonged cooling that directly affected adult dinosaurs. The rare metal iridium has been found both in active volcanoes and in a layer of clay deposited around the time of the dinosaur extinction. Therefore the dinosaurs were most likely affected by a massive volcanic eruption.Q. With which of the following statements are both scientists most likely to agree?a)Massive climate change primarily affected adult dinosaursb)Massive climate change played a key role in the extinctionc)Massive climate change primarily affected dinosaur eggsd)An extraterrestrial object brought about climate change 65 million years agoCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for The cause of the extinction of dinosaurs 65 million years ago is currently debated. Some attribute the extinction to volcanic activity while others attribute it to asteroid or comet impact. Two scientists offer conflicting viewpoints on the most probable cause of the mass extinction.Scientist AThe extinction of dinosaurs was most likely caused by the impact of an asteroid or large comet. Unusually high levels of the rare metal iridium (found in extraterrestrial material) have been discovered in a layer of clay deposited at just the time of the extinction. In addition, this layer of clay contained quartz grains with a crystal structure that has been distorted by exceedingly high pressures (almost certainly caused by an impact). This colossal impact brought about a period of severe cooling that affected dinosaur eggs rather than adult dinosaurs. Small reptiles could survive by protecting their minute eggs in a variety of ways. However, there was no way for dinosaurs to protect their large eggs against a quickly-changing climate.Scientist BThe extinction of dinosaurs was most likely caused by a volcanic outburst. In general, volcanic eruptions can have potent effects on climate. In 1815 the volcano Tambora in Indonesia erupted, spreading a pall of dust around the globe that resulted in killing frosts around Europe. The much larger eruption that formed the Deccan basalts about 65 million years ago would have caused a deeper and more prolonged cooling that directly affected adult dinosaurs. The rare metal iridium has been found both in active volcanoes and in a layer of clay deposited around the time of the dinosaur extinction. Therefore the dinosaurs were most likely affected by a massive volcanic eruption.Q. With which of the following statements are both scientists most likely to agree?a)Massive climate change primarily affected adult dinosaursb)Massive climate change played a key role in the extinctionc)Massive climate change primarily affected dinosaur eggsd)An extraterrestrial object brought about climate change 65 million years agoCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of The cause of the extinction of dinosaurs 65 million years ago is currently debated. Some attribute the extinction to volcanic activity while others attribute it to asteroid or comet impact. Two scientists offer conflicting viewpoints on the most probable cause of the mass extinction.Scientist AThe extinction of dinosaurs was most likely caused by the impact of an asteroid or large comet. Unusually high levels of the rare metal iridium (found in extraterrestrial material) have been discovered in a layer of clay deposited at just the time of the extinction. In addition, this layer of clay contained quartz grains with a crystal structure that has been distorted by exceedingly high pressures (almost certainly caused by an impact). This colossal impact brought about a period of severe cooling that affected dinosaur eggs rather than adult dinosaurs. Small reptiles could survive by protecting their minute eggs in a variety of ways. However, there was no way for dinosaurs to protect their large eggs against a quickly-changing climate.Scientist BThe extinction of dinosaurs was most likely caused by a volcanic outburst. In general, volcanic eruptions can have potent effects on climate. In 1815 the volcano Tambora in Indonesia erupted, spreading a pall of dust around the globe that resulted in killing frosts around Europe. The much larger eruption that formed the Deccan basalts about 65 million years ago would have caused a deeper and more prolonged cooling that directly affected adult dinosaurs. The rare metal iridium has been found both in active volcanoes and in a layer of clay deposited around the time of the dinosaur extinction. Therefore the dinosaurs were most likely affected by a massive volcanic eruption.Q. With which of the following statements are both scientists most likely to agree?a)Massive climate change primarily affected adult dinosaursb)Massive climate change played a key role in the extinctionc)Massive climate change primarily affected dinosaur eggsd)An extraterrestrial object brought about climate change 65 million years agoCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice The cause of the extinction of dinosaurs 65 million years ago is currently debated. Some attribute the extinction to volcanic activity while others attribute it to asteroid or comet impact. Two scientists offer conflicting viewpoints on the most probable cause of the mass extinction.Scientist AThe extinction of dinosaurs was most likely caused by the impact of an asteroid or large comet. Unusually high levels of the rare metal iridium (found in extraterrestrial material) have been discovered in a layer of clay deposited at just the time of the extinction. In addition, this layer of clay contained quartz grains with a crystal structure that has been distorted by exceedingly high pressures (almost certainly caused by an impact). This colossal impact brought about a period of severe cooling that affected dinosaur eggs rather than adult dinosaurs. Small reptiles could survive by protecting their minute eggs in a variety of ways. However, there was no way for dinosaurs to protect their large eggs against a quickly-changing climate.Scientist BThe extinction of dinosaurs was most likely caused by a volcanic outburst. In general, volcanic eruptions can have potent effects on climate. In 1815 the volcano Tambora in Indonesia erupted, spreading a pall of dust around the globe that resulted in killing frosts around Europe. The much larger eruption that formed the Deccan basalts about 65 million years ago would have caused a deeper and more prolonged cooling that directly affected adult dinosaurs. The rare metal iridium has been found both in active volcanoes and in a layer of clay deposited around the time of the dinosaur extinction. Therefore the dinosaurs were most likely affected by a massive volcanic eruption.Q. With which of the following statements are both scientists most likely to agree?a)Massive climate change primarily affected adult dinosaursb)Massive climate change played a key role in the extinctionc)Massive climate change primarily affected dinosaur eggsd)An extraterrestrial object brought about climate change 65 million years agoCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice ACT tests.

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