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23 Cards in this Set
- Front
- Back
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What is an indirect method scientists use to collect information on the Earth's structure?
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Studying the behavior of seismic waves produced by earthquakes.
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What are the layers of the earth?
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1.crust
2.mantle 3.outer core 4.inner core |
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What is the crust made up of?
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soil and different types or rocks
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It is the coolest and least dense layer of the earth
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the crust
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What is the lithosphere?
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the crust and the uppermost part of the mantle
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What does "litho" mean?
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Greek word meaning rock or stone
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What are the crust and mantle made of?
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rock
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Who is Andrija Mohorovicic?
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Croatian geologist who discovered a boundary between the crust and mantle.
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What is the break between crust and mantle called?
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Mohorovicic discontinuity or "Moho."
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What is the largest layer of the earth?
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Mantle
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Which layer of earth contains the most mass?
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the mantle
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First 62 miles of mantle are brittle, rigid rock. What is the rock further down called?
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magna
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What is magma?
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rock at its melting point
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Rocks that flow are described as what?
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plastic
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What does the outer core consist of?
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melted iron and some nickel
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Which layer is liquid and very dense?
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the outer core
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is the inner core believed to be solid or liquid?
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solid
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Why is the inner core solid?
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because of the immense pressure exerted on it
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The earth's surface is divided into two kinds of crust
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..continental crust and ocean crust
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Name the layers of the earth in order
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crust
Moho mantle outer core inner core |
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How do seismic waves help us learn about the inside of Earth?
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The waves bounce off layers at different angles, spee, and directions, which can be measured.
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What allows rock to flow?
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partially melted rock..sometimes called plastic
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Identify 2 factors that affect the density of rocks
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temperature and pressure
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