| A | B |
|---|
| metamorphic rocks | rocks that are subjected to enormous heat and pressure |
| cemetation | is when very fine (tiny) particles act as cement and “glue” the rock together |
| compaction | happens over time when pressure will press these layers together |
| deposition | is when the pieces pile up in layers at the bottom of lakes and other bodies of water |
| erosion | is when water carries these tiny pieces down streams and rivers |
| rock cycle | an endless cycle that never stops |
| weathering | breaks up rocks, plants, and shells |
| geologist | a scientist who studies rocks |
| minerals | are always made of the same elements. They are never mixed with other rocks, minerals, plants, or shells |
| sedimentary rocks | are always made up of two or more minerals. They are mixtures of minerals that have been pressed or cooled together. They can also be made from pieces of dead plants, shells, bones, etc. |
| geology | the study of rocks |
| igneous rocks | are formed when magma or lava cools and hardens and forms crystals (crystallization). The more slowly the magma or lava cools, the larger the crystal grains will be in that rock |
| sedimentary rocks | are formed by bits of rock, shells and other matter breaking up and being moved to other places |
