UNIVERSE
PLANETARY INTERIORS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Scientists analyze how earthquake waves move throught Earth’s interior.
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Scientists use satellite radar and sonar technologies to map Earth’s internal layers.
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Scientists make educated guesses about Earth’s internal structure based on previous hypothesis.
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Scientists study different types of rocks from many different locations on Earth’s surface.
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Detailed explanation-1: -Seismic waves travel at different speeds when they pass through different types of material, so by studying seismograms, scientists can learn a lot about Earth’s internal structure.
Detailed explanation-2: -So, if we can’t dig that far, how do we know what makes up the interior of the earth? Scientists are able to understand Earth’s interior by studying seismic waves. These are waves of energy that travel through Earth, and they move similarly to other types of waves, like sound waves, light waves, and water waves.
Detailed explanation-3: -Note 2: Scientists infer Earth’s inner structure by recording and studying how seismic waves travel through Earth.
Detailed explanation-4: -Knowing how the waves behave as they move through different materials enables us to learn about the layers that make up the Earth. Seismic waves tell us that the Earth’s interior consists of a series of concentric shells, with a thin outer crust, a mantle, a liquid outer core, and a solid inner core.
Detailed explanation-5: -Scientists use information from earthquakes and computer modeling to learn about Earth’s interior. Humans have never drilled past Earth’s crust, and yet we know a lot about the composition of the earth’s interior. Rocks yield some clues, but they only reveal information about the outer crust.