| A | B |
|---|
| Lava is | magma that reaches Earth's surface |
| Surface water is | water that is found in Earth's streams |
| Tropics are | regions close to the equator |
| A drought is | a period when little rain falls and crops are damaged |
| Weathering is | the process by which rock is broken down into smaller pieces |
| Runoff is | excess precipitation that flows over land into rivers streams and oceans |
| A glacier is | a large area of slow moving ice |
| Rotation is | one complete spin of Earth on its axis Each rotation takes about 24 hours |
| Plate tectonics is | a theory suggesting that Earth's surface is divided into a dozen or so slow moving plates or pieces of Earth's crust |
