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Year 7 Exam  >  Year 7 Tests  >  Test: The Earth and Its atmosphere - Year 7 MCQ

Test: The Earth and Its atmosphere - Year 7 MCQ


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10 Questions MCQ Test - Test: The Earth and Its atmosphere

Test: The Earth and Its atmosphere for Year 7 2024 is part of Year 7 preparation. The Test: The Earth and Its atmosphere questions and answers have been prepared according to the Year 7 exam syllabus.The Test: The Earth and Its atmosphere MCQs are made for Year 7 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: The Earth and Its atmosphere below.
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Test: The Earth and Its atmosphere - Question 1
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What is the primary gas in Earth's atmosphere?

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Nitrogen makes up about 78% of Earth's atmosphere, making it the primary gas.
Test: The Earth and Its atmosphere - Question 2
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Which layer of the atmosphere is closest to the Earth's surface?

Detailed Solution for Test: The Earth and Its atmosphere - Question 2
The troposphere is the lowest layer where weather and most of Earth's clouds occur.
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Test: The Earth and Its atmosphere - Question 3
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What causes the greenhouse effect in the atmosphere?

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Greenhouse gases like carbon dioxide trap heat in the atmosphere, causing the greenhouse effect.
Test: The Earth and Its atmosphere - Question 4
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Which gas protects living organisms from harmful solar radiation?
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Ozone in the stratosphere absorbs and shields the Earth from most of the sun's harmful ultraviolet radiation.
Test: The Earth and Its atmosphere - Question 5
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What is the process by which water moves from Earth's surface to the atmosphere and back?
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Precipitation involves the movement of water in its various forms between the atmosphere and Earth's surface.
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Which layer of the atmosphere contains the ozone layer?
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The ozone layer is located in the stratosphere and plays a crucial role in absorbing ultraviolet radiation.
Test: The Earth and Its atmosphere - Question 7
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What causes winds in the atmosphere?
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Differential heating of Earth's surface by the sun creates areas of high and low pressure, driving atmospheric circulation and winds.
Test: The Earth and Its atmosphere - Question 8
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Which layer of the atmosphere is characterized by extremely low temperatures?
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The mesosphere is the coldest layer of the atmosphere, with temperatures dropping as low as -90°C (-130°F).
Test: The Earth and Its atmosphere - Question 9
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What is the layer of charged particles that surrounds Earth called?
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The ionosphere contains ions and free electrons and plays a key role in radio communication by reflecting radio waves back to Earth.
Test: The Earth and Its atmosphere - Question 10
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What causes the phenomenon known as the Northern Lights?
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The Northern Lights (Aurora Borealis) occur when charged particles from the sun interact with Earth's magnetic field and atmosphere, causing beautiful light displays near the poles.
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