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Test: The Earth in Space -1 - Class 6 MCQ


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10 Questions MCQ Test - Test: The Earth in Space -1

Test: The Earth in Space -1 for Class 6 2024 is part of Class 6 preparation. The Test: The Earth in Space -1 questions and answers have been prepared according to the Class 6 exam syllabus.The Test: The Earth in Space -1 MCQs are made for Class 6 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: The Earth in Space -1 below.
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Test: The Earth in Space -1 - Question 1
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What defines a planet's "year" in the context of the Solar System?

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In the Solar System, a planet's "year" is defined by its orbital period, which refers to the time it takes for the planet to complete one full orbit around the Sun. This period varies for each planet based on its distance from the Sun and its orbital speed. For instance, Earth's orbital period is approximately 365.25 days. Understanding these orbital periods helps us comprehend the varying lengths of years on different planets.
Test: The Earth in Space -1 - Question 2
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What fundamental force is responsible for the motion of all planets and their moons in the Solar System?

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The force responsible for the motion of all planets and their moons in the Solar System is the gravitational force. This force, as described by the law of gravitation formulated by Isaac Newton, is an attraction between masses that keeps celestial bodies like planets and moons in their orbits around larger bodies like stars.
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Test: The Earth in Space -1 - Question 3
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How did technological advancements contribute to our understanding of planetary systems, including the identification of planets in other star systems?

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Technological advancements have played a crucial role in deepening our comprehension of planetary systems. By enhancing the resolution of telescopes, scientists have been able to make clearer observations and even identify planets in other star systems. This technological progress has significantly expanded our knowledge of the universe and continues to shape our understanding of celestial bodies beyond our solar system.
Test: The Earth in Space -1 - Question 4
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How did the Solar System initially form according to the nebular hypothesis?
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According to the nebular hypothesis, the Solar System originated from a solar nebula, which was a rotating cloud of gas and dust. Over millions of years, gravitational forces caused this nebula to condense and flatten into a spinning disk. Within this disk, the Sun formed at the center, while the planets coalesced from the material surrounding it. This theory provides a comprehensive explanation for the formation of our Solar System based on astronomical observations and scientific principles.
Test: The Earth in Space -1 - Question 5
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What significant role did Urbain Le Verrier play in the discovery of Neptune?
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Urbain Le Verrier made a remarkable contribution to the discovery of Neptune by predicting its existence through mathematical calculations based on the observed gravitational effects on Uranus. His predictions led to the subsequent observation of Neptune by Johann Galle in 1846, confirming the accuracy of Le Verrier's calculations. This discovery expanded our understanding of the outer reaches of the Solar System and highlighted the power of scientific reasoning and mathematical modeling in astronomical research.
Test: The Earth in Space -1 - Question 6
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What phenomenon causes variations in the sea level along the coastlines of continents?
Detailed Solution for Test: The Earth in Space -1 - Question 6
The variations in sea level along the coastlines of continents are primarily caused by the gravitational effects of the Moon. The Moon's gravitational pull influences the tides on Earth, leading to the phenomena of high tide and low tide. This interaction between the Moon and Earth's oceans results in the periodic changes in sea level that we observe.
Test: The Earth in Space -1 - Question 7
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What percentage of the Earth's surface is covered by oceans?
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Oceans cover approximately 68% of the Earth's surface. This vast expanse of water plays a crucial role in regulating the planet's climate, supporting marine biodiversity, and influencing weather patterns. The distribution of land and water on Earth's surface has a significant impact on various aspects of our planet's ecosystems and climate systems.
Test: The Earth in Space -1 - Question 8
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What causes the shifting of tidal bulges across the Earth's surface, resulting in varying tide timings and heights at different locations?
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The rotation of the Earth causes the tidal bulges to shift positions, influencing the timing and height of tides at different locations. This movement of the bulges is a direct result of the Earth's spinning motion.
Test: The Earth in Space -1 - Question 9
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How do solar eclipses occur, and what celestial alignment is necessary for a solar eclipse to take place?
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Solar eclipses occur when the Moon passes between the Earth and the Sun, blocking sunlight from reaching Earth. This alignment between the Moon, Earth, and Sun is essential for a solar eclipse to take place, creating a fascinating astronomical event where the Moon's shadow is cast on the Earth.
Test: The Earth in Space -1 - Question 10
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What fundamental concept is highlighted by the fact that the Sun and the Moon appear to be the same size from Earth during solar and lunar eclipses?
Detailed Solution for Test: The Earth in Space -1 - Question 10
The concept of angular size is illustrated during solar and lunar eclipses when the Sun and the Moon appear to be similar in size when viewed from Earth. This optical illusion is a result of their respective distances and diameters. Despite the Sun being significantly larger than the Moon, it is also much farther away, creating the visual perception that they are approximately the same size when observed from Earth.
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