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All questions of The Earth in the Solar System for Class 6 Exam
MCQ The three quarters of Sun is made up of- a)Methane
- b)Magnesium
- c) Hydrogen
- d)Water
Correct answer is option 'C'. Can you explain this answer?
MCQ The three quarters of Sun is made up of
a)
Methane
b)
Magnesium
c)
Hydrogen
d)
Water
|
Aruna Singh answered |
The sun is made of about three-quarters hydrogen, one-quarter helium, and some other heavier elements like carbon, oxygen and iron, in very small quantities. The hydrogen and helium are in a gas form.
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Which star is the head of the solar system- a)Earth
- b)Moon
- c)Sun
- d)Big bear
Correct answer is option 'C'. Can you explain this answer?
Which star is the head of the solar system
a)
Earth
b)
Moon
c)
Sun
d)
Big bear
|
Harshitha Mukherjee answered |
Our sun is a star. It is the closest star to Earth. It is the only star in our solar system.
Which of the following planets has a reddish appearance?
- a)Mars
- b)Venus
- c)Saturn
- d)Mercury
Correct answer is option 'A'. Can you explain this answer?
Which of the following planets has a reddish appearance?
a)
Mars
b)
Venus
c)
Saturn
d)
Mercury
|
Varun Kapoor answered |
Mars is the fourth planet from the Sun and is the second smallest planet in the solar system. Named after the Roman god of war, Mars is also often described as the “Red Planet” due to its reddish appearance.
Which planet appears to be yellowish?
- a)Asteroids
- b)Venus
- c)Uranus
- d)Mars
Correct answer is option 'B'. Can you explain this answer?
Which planet appears to be yellowish?
a)
Asteroids
b)
Venus
c)
Uranus
d)
Mars
|
Kavita Mehta answered |
Venus is entirely covered with a thick carbon dioxide atmosphere and sulphuric acid clouds which give it a light yellowish appearance.
Can you explain the answer of this question below:_____ is the closest celestial body to our earth.
- A:
Earth
- B:
Galaxy
- C:
Moon
- D:
Planet
The answer is C.
_____ is the closest celestial body to our earth.
Earth
Galaxy
Moon
Planet
|
|
Anjali Kapoor answered |
Moon is the nearest celestial body to our earth. Together with the Moon, Venus and Mars are the planets nearest to the Earth. All of these celestial bodies are continuously held captive to the sun by the effect of gravity; the bodies are continually forced to orbit the sun as the central body in elliptical orbits.
Which is the brightest planet in the Solar System?
- a)Mercury
- b)Venus
- c)Earth
- d)Saturn
Correct answer is option 'B'. Can you explain this answer?
Which is the brightest planet in the Solar System?
a)
Mercury
b)
Venus
c)
Earth
d)
Saturn
|
Arshiya Mehta answered |
Sunlight bouncing from these clouds is a big part of the reason that Venus is so bright. By the way, Venus isn't the most reflective body in our solar system. That honor goes to Enceladus, a moon of Saturn. Its icy surface reflects some 90% of the sunlight striking it.
Which is the closest planet to the Sun?
- a)Earth
- b)Venus
- c)Mars
- d)Mercury
Correct answer is option 'D'. Can you explain this answer?
Which is the closest planet to the Sun?
a)
Earth
b)
Venus
c)
Mars
d)
Mercury
|
Kiran Kumari answered |
The closest planet of Sun is Mercury Planet.
_____ is the closest celestial body to our earth.- a)Earth
- b)Galaxy
- c)Moon
- d)Planet
Correct answer is option 'C'. Can you explain this answer?
_____ is the closest celestial body to our earth.
a)
Earth
b)
Galaxy
c)
Moon
d)
Planet
|
Arshiya Yadav answered |
Moon is the nearest celestial body to our earth. Together with the Moon, Venus and Mars are the planets nearest to the Earth. All of these celestial bodies are continuously held captive to the sun by the effect of gravity; the bodies are continually forced to orbit the sun as the central body in elliptical orbits.
Which is the nearest star to the earth- a)Mercury
- b)Moon
- c)Veenus
- d)Sun
Correct answer is option 'D'. Can you explain this answer?
Which is the nearest star to the earth
a)
Mercury
b)
Moon
c)
Veenus
d)
Sun
|
|
Vikas Choudhury answered |
The Sun
The Sun is the closest star to Earth, about 93 million miles away. The Sun's nearest neighbor, Alpha Centauri, is actually a triple-star system —three stars bound together by gravity. Alpha Centauri A and B are two bright, closely orbiting stars with a distant, dim companion, Proxima Centauri.
The different group of stars is known as:
- a)Constellations
- b)Celestial bodies
- c)Asteroids
- d)Comet
Correct answer is option 'A'. Can you explain this answer?
The different group of stars is known as:
a)
Constellations
b)
Celestial bodies
c)
Asteroids
d)
Comet
|
|
Alok Verma answered |
Patterns formed by different groups of stars are called constellation. A certain group of stars form an image like structure from the group. Some common constellations are big dipper, Orion, Ursa Major, Ursa minor, etc.
____ are heavenly bodies that shine by their own light- a)Galaxy
- b)Earth
- c)Stars
- d)Moon
Correct answer is option 'C'. Can you explain this answer?
____ are heavenly bodies that shine by their own light
a)
Galaxy
b)
Earth
c)
Stars
d)
Moon
|
|
Keerthana Nambiar answered |
Stars make their own light. Whereas moon , asteroids and counts shine by light reflected from the sun. Star shine because they are extremely hot. The source of their energy is nuclear reaction going deep inside the stars. In most stars like sun hydrogen is being converted into helium and during this process it gives off energy that heats the stars.
Moon appears big because- a)It is very big than the earth
- b)It is bigger than the sun
- c)It is near to the earth
- d)It is far away from the earth
Correct answer is option 'C'. Can you explain this answer?
Moon appears big because
a)
It is very big than the earth
b)
It is bigger than the sun
c)
It is near to the earth
d)
It is far away from the earth
|
Neha Joshi answered |
When the moon is near the horizon, the ground and horizon make the moon appear relatively close. Because the moon is changing its apparent position in depth while the light stimulus remains constant, the brain's size-distance mechanism changes its perceived size and makes the moon appear very large.
What is the largest Planet in the Solar System?- a)Veenus
- b)Mercury
- c)Earth
- d)Jupiter
Correct answer is 'D'. Can you explain this answer?
What is the largest Planet in the Solar System?
a)
Veenus
b)
Mercury
c)
Earth
d)
Jupiter
|
|
Kiran Mehta answered |
Largest Planet: Jupiter. The largest planet in our solar system by far is Jupiter, which beats out all the other planets in both mass and volume. Jupiter's mass is more than 300 times that of Earth, and its diameter, at 140,000 km, is about 11 times Earth's diameter.
Human-made Satellite is an artificial body. It is designed by- a)Manufacturers
- b)Farmers
- c)Scientists
- d)Lawyer
Correct answer is option 'C'. Can you explain this answer?
Human-made Satellite is an artificial body. It is designed by
a)
Manufacturers
b)
Farmers
c)
Scientists
d)
Lawyer
|
Rohit Jain answered |
Scientists designs artificial Satellites. Artificial satellites can have a range of missions, including scientific research, weather observation, military support, navigation, Earth imaging, and communications. Some satellites fulfill a single purpose, while others are designed to perform several functions at the same time.
On which planet the life exists? - a)Earth
- b)Moon
- c)Jupiter
- d)None
Correct answer is option 'A'. Can you explain this answer?
On which planet the life exists?
a)
Earth
b)
Moon
c)
Jupiter
d)
None
|
|
Amit Sharma answered |
Earth. It has oxygen and water present in proportions that allow life to thrive
Stars appear to move from - a)West to east
- b)East to west
- c)North to south
- d)South to west
Correct answer is option 'B'. Can you explain this answer?
Stars appear to move from
a)
West to east
b)
East to west
c)
North to south
d)
South to west
|
|
Alok Verma answered |
And that's because Earth spins -- toward the east. ... For the moment, let us just think about one motion - - Earth's spin (or rotation) on its axis. Earth rotates or spins toward the east, and that's why the Sun, Moon, planets, and stars all rise in the east and make their way westward across the sky.
What phenomenon is observed when small pieces of rocks burn up upon entering the Earth's atmosphere?
- a)Meteoroids
- b)Asteroids
- c)Constellations
- d)Meteors
Correct answer is option 'D'. Can you explain this answer?
What phenomenon is observed when small pieces of rocks burn up upon entering the Earth's atmosphere?
a)
Meteoroids
b)
Asteroids
c)
Constellations
d)
Meteors
|
|
Nishanth Iyer answered |
Shooting Stars:
Shooting stars are observed when small pieces of rocks burn up upon entering the Earth's atmosphere. This phenomenon is quite common and can be seen on clear nights in various parts of the world.
Explanation:
- Meteoroids: These small pieces of rocks that enter the Earth's atmosphere are called meteoroids. They are typically fragments from comets or asteroids.
- Atmospheric Entry: As meteoroids enter the Earth's atmosphere, they encounter air resistance which causes them to heat up and eventually burn up. This process creates the bright streaks of light that we see in the sky, known as shooting stars.
- Speed: The speed at which meteoroids enter the atmosphere can vary, with some traveling at speeds of up to 160,000 miles per hour. This high speed contributes to the intense heat generated during the atmospheric entry.
- Composition: The composition of the meteoroid can also affect the appearance of the shooting star. Some meteoroids contain metals that produce colorful trails as they burn up, adding to the spectacle of the event.
- Observation: Meteor showers, which occur when the Earth passes through debris left behind by comets, are a great opportunity to observe shooting stars. During these events, multiple shooting stars can be seen streaking across the sky in a short period of time.
In conclusion, shooting stars are a fascinating natural phenomenon caused by small rocks burning up as they enter the Earth's atmosphere. They provide a stunning visual display for observers and are a reminder of the dynamic nature of our planet's interactions with space debris.
Shooting stars are observed when small pieces of rocks burn up upon entering the Earth's atmosphere. This phenomenon is quite common and can be seen on clear nights in various parts of the world.
Explanation:
- Meteoroids: These small pieces of rocks that enter the Earth's atmosphere are called meteoroids. They are typically fragments from comets or asteroids.
- Atmospheric Entry: As meteoroids enter the Earth's atmosphere, they encounter air resistance which causes them to heat up and eventually burn up. This process creates the bright streaks of light that we see in the sky, known as shooting stars.
- Speed: The speed at which meteoroids enter the atmosphere can vary, with some traveling at speeds of up to 160,000 miles per hour. This high speed contributes to the intense heat generated during the atmospheric entry.
- Composition: The composition of the meteoroid can also affect the appearance of the shooting star. Some meteoroids contain metals that produce colorful trails as they burn up, adding to the spectacle of the event.
- Observation: Meteor showers, which occur when the Earth passes through debris left behind by comets, are a great opportunity to observe shooting stars. During these events, multiple shooting stars can be seen streaking across the sky in a short period of time.
In conclusion, shooting stars are a fascinating natural phenomenon caused by small rocks burning up as they enter the Earth's atmosphere. They provide a stunning visual display for observers and are a reminder of the dynamic nature of our planet's interactions with space debris.
Planets do not have their own- a)Heat and Water
- b)Oxygen and Water
- c)Water and light
- d)Heat and light
Correct answer is option 'D'. Can you explain this answer?
Planets do not have their own
a)
Heat and Water
b)
Oxygen and Water
c)
Water and light
d)
Heat and light
|
|
Rajesh Khatri answered |
Celestial Bodies that have their own heat and which emit light in large amounts is called as stars.They have their own heat and light, which they emit in large amounts. Planets are also celestial bodies,but they do not have their own heat and light. They are lit by the light of stars.
What term describes the smallest celestial bodies that move around the sun and can cause flashes of light upon entering the Earth's atmosphere?- a)Planets
- b)Meteoroids
- c)Comets
- d)Asteroids
Correct answer is option 'B'. Can you explain this answer?
a)
Planets
b)
Meteoroids
c)
Comets
d)
Asteroids
|
|
Varun Jain answered |
Meteoroids
Meteoroids are the smallest celestial bodies that move around the sun and can cause flashes of light upon entering the Earth's atmosphere. Here's a detailed explanation:
- Definition: Meteoroids are small rocky or metallic bodies that travel through space. They are significantly smaller than asteroids and comets.
- Origin: Meteoroids can come from various sources, such as the debris left behind by comets or the fragments of asteroids. They can also be formed from collisions between larger celestial bodies.
- Entry into Earth's Atmosphere: When a meteoroid enters the Earth's atmosphere, it starts to burn up due to the intense friction with the air. This process creates a bright streak of light known as a meteor or shooting star.
- Impact: Most meteoroids are small and burn up completely in the atmosphere, posing no threat to the Earth. However, larger meteoroids can survive the journey through the atmosphere and hit the Earth's surface, causing an impact event.
- Size: Meteoroids can vary in size from tiny particles to larger objects several meters in diameter. The size of a meteoroid determines the brightness of the resulting meteor when it enters the atmosphere.
In conclusion, meteoroids are the smallest celestial bodies that can cause flashes of light as they enter the Earth's atmosphere. These tiny objects play a fascinating role in our night skies and can provide stunning displays for observers on Earth.
Meteoroids are the smallest celestial bodies that move around the sun and can cause flashes of light upon entering the Earth's atmosphere. Here's a detailed explanation:
- Definition: Meteoroids are small rocky or metallic bodies that travel through space. They are significantly smaller than asteroids and comets.
- Origin: Meteoroids can come from various sources, such as the debris left behind by comets or the fragments of asteroids. They can also be formed from collisions between larger celestial bodies.
- Entry into Earth's Atmosphere: When a meteoroid enters the Earth's atmosphere, it starts to burn up due to the intense friction with the air. This process creates a bright streak of light known as a meteor or shooting star.
- Impact: Most meteoroids are small and burn up completely in the atmosphere, posing no threat to the Earth. However, larger meteoroids can survive the journey through the atmosphere and hit the Earth's surface, causing an impact event.
- Size: Meteoroids can vary in size from tiny particles to larger objects several meters in diameter. The size of a meteoroid determines the brightness of the resulting meteor when it enters the atmosphere.
In conclusion, meteoroids are the smallest celestial bodies that can cause flashes of light as they enter the Earth's atmosphere. These tiny objects play a fascinating role in our night skies and can provide stunning displays for observers on Earth.
What is the largest Planet in the Solar System?- a)Veenus
- b)Mercury
- c)Earth
- d)Jupiter
Correct answer is option 'D'. Can you explain this answer?
What is the largest Planet in the Solar System?
a)
Veenus
b)
Mercury
c)
Earth
d)
Jupiter
|
|
Kiran Mehta answered |
Largest Planet: Jupiter. The largest planet in our solar system by far is Jupiter, which beats out all the other planets in both mass and volume. Jupiter's mass is more than 300 times that of Earth, and its diameter, at 140,000 km, is about 11 times Earth's diameter.
Q: Which planet don't have rings around them?
- a)Neptune
- b)Saturn
- c)Mars
- d)Uranus
Correct answer is option 'C'. Can you explain this answer?
Q: Which planet don't have rings around them?
a)
Neptune
b)
Saturn
c)
Mars
d)
Uranus
|
Torcia Education answered |
When meteoroids survive their journey through Earth's atmosphere and land on the ground, they are called meteorites. These space rocks provide valuable information about the composition of our solar system.
How does the moon shine?
- a)Have their own natural light
- b)Reflects the Venus light
- c)Reflects the earth light
- d)Reflects the sunlight
Correct answer is option 'D'. Can you explain this answer?
How does the moon shine?
a)
Have their own natural light
b)
Reflects the Venus light
c)
Reflects the earth light
d)
Reflects the sunlight
|
|
Alok Verma answered |
The moon shines because its surface reflects light from the sun. And despite the fact that it sometimes seems to shine very brightly, the moon reflects only between 3 and 12 percent of the sunlight that hits it. The perceived brightness of the moon from Earth depends on where the moon is in its orbit around the planet.
What celestial bodies are found between the orbits of Mars and Jupiter?- a)Meteoroids
- b)Comets
- c)Asteroids
- d)Satellites
Correct answer is option 'C'. Can you explain this answer?
a)
Meteoroids
b)
Comets
c)
Asteroids
d)
Satellites
|
|
Torcia Education answered |
Asteroids are tiny celestial bodies found between the orbits of Mars and Jupiter, forming the asteroid belt. Scientists believe they are remnants of a planet that exploded many years ago.
What is the term used for the elliptical path in which a planet revolves around the sun?- a)Orbit
- b)Constellation
- c)Axis
- d)Meridian
Correct answer is option 'A'. Can you explain this answer?
a)
Orbit
b)
Constellation
c)
Axis
d)
Meridian
|
|
Torcia Education answered |
An orbit is the particular and definite elliptical path in which a planet or satellite always remains while revolving around a star or planet.
What term describes the planet Mars in terms of its color?- a)Blue Planet
- b)Red Planet
- c)Green Planet
- d)Yellow Planet
Correct answer is option 'B'. Can you explain this answer?
a)
Blue Planet
b)
Red Planet
c)
Green Planet
d)
Yellow Planet
|
|
Torcia Education answered |
Mars is often called the Red Planet due to its reddish appearance, which is caused by iron oxide or rust on its surface.
Which of the following is a natural satellite?- a)IRSA
- b)EDUSAT
- c)Moon
- d)INSAT-I
Correct answer is option 'C'. Can you explain this answer?
Which of the following is a natural satellite?
a)
IRSA
b)
EDUSAT
c)
Moon
d)
INSAT-I
|
|
Varun Kapoor answered |
Earth has one large natural satellite, known as the Moon; and Mars has two tiny natural satellites, Phobos and Deimos. Moons are a callednatural satellite because they orbit planets. ...Satellites that are made by people and launched into orbit using rockets are called artificial satellites. There are thousands of artificialsatellitesorbiting the Earth.
What is the main source of heat and light for the solar system?- a)The Earth
- b)The Moon
- c)The Sun
- d)Jupiter
Correct answer is option 'C'. Can you explain this answer?
a)
The Earth
b)
The Moon
c)
The Sun
d)
Jupiter
|
EduRev Class 6 answered |
The Sun is the primary source of heat and light for the entire solar system. Despite its immense distance from Earth, it provides the necessary energy to sustain life on our planet.
Which constellation is known for having a pattern that resembles a big bear?- a)Orion
- b)Cassiopeia
- c)Ursa Major
- d)Draco
Correct answer is option 'C'. Can you explain this answer?
a)
Orion
b)
Cassiopeia
c)
Ursa Major
d)
Draco
|
Nishanth Majumdar answered |
Ursa Major - The Great Bear Constellation
Ursa Major is known for having a pattern that resembles a big bear. Here's why:
- Shape: Ursa Major is one of the most well-known constellations in the night sky. It is often referred to as the Great Bear because its shape indeed resembles that of a bear. The pattern is made up of seven bright stars that form a shape similar to a ladle or a dipper.
- Key Stars: The two outer stars of the ladle are called the "Pointers" because they point towards the North Star, Polaris. The other five stars form the body and tail of the bear.
- Mythology: In Greek mythology, Ursa Major is associated with the story of Callisto, a beautiful nymph who was turned into a bear by the goddess Artemis. Zeus later placed her in the sky to protect her from harm, where she became the constellation Ursa Major.
- Visibility: Ursa Major is visible in the northern hemisphere throughout the year. It is best seen during the spring months when it is high in the sky.
- Usefulness: Ursa Major is a useful constellation for navigation because the two Pointer stars can help locate the North Star, which in turn helps determine true north.
So, if you ever look up at the night sky and spot a pattern that resembles a big bear, chances are you're looking at the Ursa Major constellation.
Ursa Major is known for having a pattern that resembles a big bear. Here's why:
- Shape: Ursa Major is one of the most well-known constellations in the night sky. It is often referred to as the Great Bear because its shape indeed resembles that of a bear. The pattern is made up of seven bright stars that form a shape similar to a ladle or a dipper.
- Key Stars: The two outer stars of the ladle are called the "Pointers" because they point towards the North Star, Polaris. The other five stars form the body and tail of the bear.
- Mythology: In Greek mythology, Ursa Major is associated with the story of Callisto, a beautiful nymph who was turned into a bear by the goddess Artemis. Zeus later placed her in the sky to protect her from harm, where she became the constellation Ursa Major.
- Visibility: Ursa Major is visible in the northern hemisphere throughout the year. It is best seen during the spring months when it is high in the sky.
- Usefulness: Ursa Major is a useful constellation for navigation because the two Pointer stars can help locate the North Star, which in turn helps determine true north.
So, if you ever look up at the night sky and spot a pattern that resembles a big bear, chances are you're looking at the Ursa Major constellation.
How often can we observe a Full Moon Night?- a)Once a week
- b)Once a month
- c)Twice a month
- d)Once a year
Correct answer is option 'B'. Can you explain this answer?
a)
Once a week
b)
Once a month
c)
Twice a month
d)
Once a year
|
|
Torcia Education answered |
A Full Moon Night, or Poornima, can be observed once a month. This occurs when the moon is fully illuminated by the sun's light, appearing as a complete sphere.
Which celestial body is a natural satellite of the Earth?- a)The Sun
- b)Mars
- c)The Moon
- d)Venus
Correct answer is option 'C'. Can you explain this answer?
a)
The Sun
b)
Mars
c)
The Moon
d)
Venus
|
Dr Manju Sen answered |
The Moon is the Earth's natural satellite. It orbits around the Earth and is the closest celestial body to our planet, influencing various phenomena such as tides.
What is the name given to the white glowing path across the sky that is actually a cluster of millions of stars?- a)Orion's Belt
- b)Milky Way Galaxy
- c)Andromeda Galaxy
- d)Sagittarius Galaxy
Correct answer is option 'B'. Can you explain this answer?
What is the name given to the white glowing path across the sky that is actually a cluster of millions of stars?
a)
Orion's Belt
b)
Milky Way Galaxy
c)
Andromeda Galaxy
d)
Sagittarius Galaxy
|
Rahul Kumar answered |
The Milky Way Galaxy is a broad, white glowing band seen across the sky, consisting of millions of stars. Our solar system is part of this galaxy.
How far is the Sun from the Earth?- a)150,000 km
- b)1.5 million km
- c)15 million km
- d)150 million km
Correct answer is option 'D'. Can you explain this answer?
a)
150,000 km
b)
1.5 million km
c)
15 million km
d)
150 million km
|
|
Torcia Education answered |
The Sun is approximately 150 million kilometers away from the Earth. This vast distance is one of the reasons we do not feel its immense heat directly.
The stars are not visible during the day because- a)Of their self illumination
- b)Stars are far away from the earth
- c)Sun light is very bright
- d)Their size is large
Correct answer is option 'C'. Can you explain this answer?
The stars are not visible during the day because
a)
Of their self illumination
b)
Stars are far away from the earth
c)
Sun light is very bright
d)
Their size is large
|
|
Varun Kapoor answered |
Stars do glow during the day, but we can't see them because of the glare of sunlight. When the sun is up, the blue color in sunlight gets scattered all over the atmosphere, turning the sky the familiar bright blue color. This blue light is much brighter than the faint light coming from the stars, so it prevents us from seeing them.
If you were standing on the Moon, for instance, where there is no atmosphere, you would see the stars both day and night.
What is the term for a night when the moon is not visible at all in the sky?- a)Full Moon Night
- b)New Moon Night
- c)Lunar Eclipse
- d)Solar Eclipse
Correct answer is option 'B'. Can you explain this answer?
a)
Full Moon Night
b)
New Moon Night
c)
Lunar Eclipse
d)
Solar Eclipse
|
|
Torcia Education answered |
A New Moon Night, or Amavasya, occurs about fifteen days after a Full Moon Night. On this night, the moon is not visible from the Earth because it is positioned between the Earth and the Sun.
What is the primary component of stars?- a)Water
- b)Gases
- c)Rocks
- d)Dust
Correct answer is option 'B'. Can you explain this answer?
a)
Water
b)
Gases
c)
Rocks
d)
Dust
|
Akshita Reddy answered |
Primary Component of Stars: Gases
Stars are primarily composed of gases, with hydrogen and helium being the most abundant elements. These gases undergo nuclear fusion in the star's core, producing energy that is emitted as light and heat. Let's delve deeper into the composition of stars:
Hydrogen:
- Hydrogen is the most abundant element in stars, making up about 75% of their mass.
- In the core of a star, hydrogen atoms fuse together to form helium, releasing large amounts of energy in the process.
Helium:
- Helium is the second most abundant element in stars, constituting around 24% of their mass.
- Helium is produced through the fusion of hydrogen atoms in the star's core.
Other Gases:
- Stars also contain trace amounts of other gases, such as carbon, oxygen, and nitrogen.
- These elements play important roles in the star's life cycle and can influence its color, temperature, and luminosity.
Importance of Gases:
- Gases are crucial for the existence and function of stars, as they provide the fuel for nuclear fusion reactions.
- Without gases, stars would not be able to generate the energy needed to sustain themselves and emit light and heat.
In conclusion, gases, particularly hydrogen and helium, are the primary components of stars. Their interactions and fusion reactions within the stellar core are responsible for the immense energy output that sustains stars and allows them to shine brightly in the night sky.
Stars are primarily composed of gases, with hydrogen and helium being the most abundant elements. These gases undergo nuclear fusion in the star's core, producing energy that is emitted as light and heat. Let's delve deeper into the composition of stars:
Hydrogen:
- Hydrogen is the most abundant element in stars, making up about 75% of their mass.
- In the core of a star, hydrogen atoms fuse together to form helium, releasing large amounts of energy in the process.
Helium:
- Helium is the second most abundant element in stars, constituting around 24% of their mass.
- Helium is produced through the fusion of hydrogen atoms in the star's core.
Other Gases:
- Stars also contain trace amounts of other gases, such as carbon, oxygen, and nitrogen.
- These elements play important roles in the star's life cycle and can influence its color, temperature, and luminosity.
Importance of Gases:
- Gases are crucial for the existence and function of stars, as they provide the fuel for nuclear fusion reactions.
- Without gases, stars would not be able to generate the energy needed to sustain themselves and emit light and heat.
In conclusion, gases, particularly hydrogen and helium, are the primary components of stars. Their interactions and fusion reactions within the stellar core are responsible for the immense energy output that sustains stars and allows them to shine brightly in the night sky.
Which celestial bodies are referred to as 'wanderers' in Greek?- a)Stars
- b)Planets
- c)Constellations
- d)Meteoroids
Correct answer is option 'B'. Can you explain this answer?
a)
Stars
b)
Planets
c)
Constellations
d)
Meteoroids
|
|
Mahesh Chavan answered |
Planets
Planets are referred to as 'wanderers' in Greek because of their apparent motion in the night sky. The ancient Greeks noticed that while stars seemed to remain fixed relative to each other, some celestial bodies moved across the sky over time. These moving bodies were called 'planētai,' which means 'wanderers' in Greek.
Reason for the Motion
The motion of planets is a result of their orbits around the Sun. As the Earth and other planets move in their orbits, their positions relative to the background stars change, creating the illusion of wandering across the sky.
Ancient Observations
Ancient astronomers, such as the Greeks, observed the movements of these wanderers and recorded their paths in the night sky. They identified several planets visible to the naked eye, including Mercury, Venus, Mars, Jupiter, and Saturn.
Importance of Planets
The study of planets has been crucial in understanding the solar system and the universe. Observations of planets have led to significant discoveries about their composition, atmospheres, moons, and interactions with other celestial bodies.
Conclusion
In Greek mythology and astronomy, planets were known as wanderers due to their apparent motion in the night sky. This observation played a significant role in shaping our understanding of the cosmos and continues to inspire scientific exploration today.
Planets are referred to as 'wanderers' in Greek because of their apparent motion in the night sky. The ancient Greeks noticed that while stars seemed to remain fixed relative to each other, some celestial bodies moved across the sky over time. These moving bodies were called 'planētai,' which means 'wanderers' in Greek.
Reason for the Motion
The motion of planets is a result of their orbits around the Sun. As the Earth and other planets move in their orbits, their positions relative to the background stars change, creating the illusion of wandering across the sky.
Ancient Observations
Ancient astronomers, such as the Greeks, observed the movements of these wanderers and recorded their paths in the night sky. They identified several planets visible to the naked eye, including Mercury, Venus, Mars, Jupiter, and Saturn.
Importance of Planets
The study of planets has been crucial in understanding the solar system and the universe. Observations of planets have led to significant discoveries about their composition, atmospheres, moons, and interactions with other celestial bodies.
Conclusion
In Greek mythology and astronomy, planets were known as wanderers due to their apparent motion in the night sky. This observation played a significant role in shaping our understanding of the cosmos and continues to inspire scientific exploration today.
Which planet is known as the 'Earth's-twin' due to its similar size and shape?- a)Mars
- b)Venus
- c)Mercury
- d)Neptune
Correct answer is option 'B'. Can you explain this answer?
a)
Mars
b)
Venus
c)
Mercury
d)
Neptune
|
Keystone Instructors answered |
Venus is called 'Earth’s-twin' because its size and shape are very similar to those of the Earth. Despite these similarities, the conditions on Venus are extremely different from those on Earth.
Which celestial body is known for always indicating the north direction?- a)The Sun
- b)The Moon
- c)The Pole Star
- d)The Saptarishi
Correct answer is option 'C'. Can you explain this answer?
a)
The Sun
b)
The Moon
c)
The Pole Star
d)
The Saptarishi
|
|
Sanjana Mukherjee answered |
Explanation:
The Pole Star:
- The Pole Star, also known as Polaris, is a star in the constellation Ursa Minor.
- It is located very close to the north celestial pole, making it a reliable indicator of the north direction.
- The position of the Pole Star remains relatively stable throughout the night, making it useful for navigation.
Importance in Navigation:
- Sailors and travelers have long used the Pole Star to determine their direction.
- By locating the Pole Star in the night sky, one can easily identify the north direction, which is crucial for navigation.
Constellation Ursa Minor:
- The Pole Star is located in the constellation Ursa Minor, which is commonly known as the Little Dipper.
- Ursa Minor is a circumpolar constellation, meaning it never sets below the horizon, making the Pole Star visible throughout the night.
Conclusion:
The Pole Star, or Polaris, is a celestial body known for always indicating the north direction due to its proximity to the north celestial pole. Its stability and visibility make it a valuable navigational tool for sailors, travelers, and astronomers alike.
The Pole Star:
- The Pole Star, also known as Polaris, is a star in the constellation Ursa Minor.
- It is located very close to the north celestial pole, making it a reliable indicator of the north direction.
- The position of the Pole Star remains relatively stable throughout the night, making it useful for navigation.
Importance in Navigation:
- Sailors and travelers have long used the Pole Star to determine their direction.
- By locating the Pole Star in the night sky, one can easily identify the north direction, which is crucial for navigation.
Constellation Ursa Minor:
- The Pole Star is located in the constellation Ursa Minor, which is commonly known as the Little Dipper.
- Ursa Minor is a circumpolar constellation, meaning it never sets below the horizon, making the Pole Star visible throughout the night.
Conclusion:
The Pole Star, or Polaris, is a celestial body known for always indicating the north direction due to its proximity to the north celestial pole. Its stability and visibility make it a valuable navigational tool for sailors, travelers, and astronomers alike.
What is the shape of the Earth commonly referred to as?- a)Spherical
- b)Geoid
- c)Elliptical
- d)Circular
Correct answer is option 'B'. Can you explain this answer?
a)
Spherical
b)
Geoid
c)
Elliptical
d)
Circular
|
|
Torcia Education answered |
The shape of the Earth is referred to as a geoid. It is almost spherical but slightly flattened at the poles, giving it a unique earth-like shape.
Which planet is closest to the Sun and has the shortest orbital period around it?- a)Earth
- b)Mercury
- c)Venus
- d)Mars
Correct answer is option 'B'. Can you explain this answer?
Which planet is closest to the Sun and has the shortest orbital period around it?
a)
Earth
b)
Mercury
c)
Venus
d)
Mars
|
Rohini Seth answered |
Mercury is the closest planet to the Sun in our solar system. It orbits the Sun at a distance closer than any other planet, which contributes to its extreme temperatures ranging from very hot to very cold. Due to its proximity to the Sun, Mercury completes one orbit around it in approximately 88 Earth days, making it the planet with the shortest orbital period among all planets in our solar system.
Which planet takes the shortest time to complete one orbit around the sun?- a)Mercury
- b)Venus
- c)Earth
- d)Mars
Correct answer is option 'A'. Can you explain this answer?
a)
Mercury
b)
Venus
c)
Earth
d)
Mars
|
|
Torcia Education answered |
Mercury, being the closest planet to the sun, takes only about 88 days to complete one orbit around the sun, which is the shortest time compared to other planets.
Which of the following is the largest planet in our solar system?- a)Earth
- b)Saturn
- c)Neptune
- d)Jupiter
Correct answer is option 'D'. Can you explain this answer?
a)
Earth
b)
Saturn
c)
Neptune
d)
Jupiter
|
|
Keystone Instructors answered |
Jupiter is the largest planet in our solar system. It has a diameter of about 142,984 km, which is significantly larger than any other planet.
Chapter doubts & questions for The Earth in the Solar System - Social Studies (SST) Class 6 2024 is part of Class 6 exam preparation. The chapters have been prepared according to the Class 6 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 6 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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