| A | B |
|---|
| Igneous rock that cools very quickly when it forms may have a texture that is | smooth and shiny with no visible grain. |
| When all the grains in a rock are large and easy to see, the rock is described as | coarse grained. |
| Rock that forms from the cooling of magma below the surface or lava at the surface is call | igneous rock. |
| Igneous rock that formed from lava that erupted onto Earth’s surface is called | extrusive rock. |
| The most abundant intrusive rock in the continental crust is | granite. |
| The process by which sediment drops out of the water or wind carrying it is | deposition |
| To describe a rock’s texture, geologists determine | the size, shape, and pattern of the rock’s grains. |
| The sedimentary rock formed when water deposits tiny particles of clay in very thin, flat layers is called | shale |
| Chalk formed from sediments made of skeletons of microscopic living things in the ocean must be a(n) | organic rock. |
| Heat and pressure deep beneath Earth’s surface can change any rock into | metamorphic rock. |
| Geologists classify metamorphic rock into two groups according to | the arrangement of the grains that make up the rock. |
