1. Chapter 7, Lesson 1Earth’s Changing Crust fault geologist magma lava weathering erosion deposition surveyor elevation seismograph tension compression shear

2. fault – a crack in the Earth’s crust

3. geologist – scientists who study Earth

4. magma – hot, molten rock beneath the earth’s surface

5. lava – magma that reaches the earth’s surface

6. weathering – the breaking down of the materials of the earth’s crust Click on this picture to explore different types of weathering.

7. erosion – is the picking up and carrying away of weathered pieces of earth

8. deposition – the dropping of bits of rock

9. surveyor – people who measure the earth

10. elevation – the height of land above sea level

11. seismograph – a device used to measure vibrations of the Earth’s crust

12. tension – stretches or pulls the Earth’s crust apart

13. compression – squeezes or pushed the Earth’s crust together

14. shear – twists, tears, or pushes one part of the crust past another