| A | B |
|---|
| fault | a break in a body of rock along which one block slides relative to another; a form of brittle strain |
| asthenosphere | the layer of the mantle beneath the lithosphere; made of mantle rock that flows very slowly, which allows tectonic plates to move on top of it |
| uplift | the elevation of regions of the Earth's crust |
| plate tectonics | the theory that explains how large pieces of the lithosphere, called plates, move and change shape |
| continental drift | the hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations |
| lithosphere | the solid, outer layer of Earth that consists of the crust and the rigid upper part of the mantle |
| core | the central part of the Earth below the mantle |
| divergent boundary | the boundary between two tectonic plates that are moving away from each other |
| convergent boundary | the boundary between tectonic plates that are colliding |
| fold | a form of strain in which rock layers bend, usually as a result of compression |
