Unit Test

Question 1

How do earthquakes help geologists understand Earth’s interior? During an earthquake, geologists use a machine called a to study seismic waves. P waves can pass through both solid and molten rock, but S waves can pass only through rock.

Revolt · Accepted Answer

Selection 1: seismograph; Selection 2: solid

Question 2

Which event would most likely occur if Earth did not retain the heat from its formation?

Revolt · Accepted Answer

The asthenosphere and outer core would solidify.

Question 3

A scientist uses a special instrument to measure the depth of Earth’s crust. He measures one location that is 65 kilometers deep. Where is this section of crust most likely located?

Revolt · Accepted Answer

below a mountain range

Question 4

Which phrases are true of only the mantle? Check all that apply.

Revolt · Accepted Answer

made of three layers; has a tarry layer; has a solid outer layer

Question 5

Use the drop-down menus to select the part of Earth best described by each phrase. May help create Earth’s magnetic field Can be thick or thin, depending on location Made of molten metal The location of Earth’s plates

Revolt · Accepted Answer

4; May help create Earth’s magnetic field: 4; Can be thick or thin, depending on location: 1; Made of molten metal: 4; 1

Question 6

✔ 123

Revolt · Accepted Answer

1

Question 7

2✔ 45

Revolt · Accepted Answer

4

Question 8

✔ 134

Revolt · Accepted Answer

1

Question 9

You have learned that different types of rocks are found in Earth’s layers. Their composition affects their densities.What can you conclude based on the information in the table?

Revolt · Accepted Answer

The rocks in the lower mantle are the most dense.

Unit Test Answers

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