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Science study guide for Ch. 2, lesson 1
1. Earth has four layers.
2. Scientists believed that fossils were carried to places by plate movements.
3. Geysers form in places where water drains down a deep channel, hot rocks in the
deep channel heat the water and cause it to erupt from the ground.
4. Fossils are found in sedimentary rock.
5. Seismic waves are vibrations that travel through the Earth during an earthquake.
6. A fossil is the remains or traces of a plant or animal that lived long ago.
7. Scientists have studied temperatures inside the Earth by drilling holes in the Earth’s crust.
8. Layers of sedimentary rock give hints to changes that were happening when layers formed.
Earth’s thin outer layer is called the crust.
10. When plates move past each other they are called sliding boundaries.
11. The hottest layer of the Earth is the inner core.
12. At diverging boundaries, two plates move away from each other.
13. The thickest layer of the Earth is called the mantle.
14. At converging boundaries, two plate move toward each other.
15. The only layer of the Earth that is liquid is called outer core.
16. When one plate rides up over another and push the other under the surface, it is called
17. The inner core is under such high pressure that it is solid.
18. The idea of giant plates of rock moving slowly across the Earth’s surface is called
plate tectonics.
19. The upper part of the mantle joins with the crust to form the lithosphere.
20. Alfred Wegener said that the continents moved very slowly across Earth’s
was known as the continental drift theory.