click below
click below
Normal Size Small Size show me how
Inside Earth 2:1
Ch. 2 Sec. 1 Earth's Crust in Motion
| Question | Answer |
|---|---|
| stress | A force acting on rock to change its shape or volume. |
| shearing | Stress that pushes masses of rock in opposite directions. |
| compression | Stress that squeezes rock until it folds or breaks. |
| tension | Stress that streches rock so that it becomes thinner in the middle. |
| deformatation | A change in the volume or shape of Earth's crust. |
| fault | a break in Earth's crust where slabs of rock slip past each other. |
| strike-slip fault | A fault where rocks on either side move past each other with little up or down motion |
| normal fault | A fault where the hanging wall slides downward; caused by tension in the crust. |
| hanging wall | The block of rock that lies above a fault line. |
| footwall | The block of rock that lies below the fault line. |
| reverse fault | a type of fault where the hanging wall slides upward. |
| fault-block mountain | A mountain that forms where a normal fault uplifts a block of rock. |
| fold | A bend in rock that forms where part of Earth's crust is compressed. |
| anticline | An upward fold in rock formed by compression of Earth's crust. |
| syncline | A downward fold in rock formed by compression in Earth's crust. |
| plateau | A large area of flat land elevated high above sea level. |