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3.21: Planet Earth- Challenge 3

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1. The high point of a wave is called the ___.
crest
2. Earth's magnetic field is a clue that Earth's interior is made of ___.
metal
3. Scientists have learned a lot about Earth's interior through the study of ___.
seismic waves, Earth's magnetic field, and rocks
4. The lithosphere consists of the ___ and uppermost mantle.
crust
5. Which layer of Earth is made up of mostly iron metal?
Core
6. The ___ is made up of rock that is less dense than the mantle.
crust
7. ___ crust is thinner and denser than continental crust.
Oceanic
8. Which crust (Oceanic or Continental) is made up of basaltic rock?
Oceanic
9. Continental crust is ___.
felsic
10. Scientists know that the mantle is made up of rock based on evidence from ___.
seismic waves, heat flow, and meteorites
11. The ___ heats up the mantle.
core
12. Scientists can tell that the ___ is made of hot, solid rock from seismic waves, meteorites, and Earth's own internal heat.
mantle

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