| A | B |
|---|
| Two types of igneous rock | intrusive and extrusive |
| Three types of sedimentary rock | chemical, detrital, organic |
| Two types of metamorphic rock | foliated and nonfoliated |
| weathering | breaking down of rock into smaller pieces |
| erosion | movement of sediments |
| the smallest object that can still be called an element is an _______ | atom |
| an element can exist as either an atom or a ________ | molecule |
| a compound can consist of a _______ atom | single |
| All _________ are compounds | molecules |
| a molecule is made up of two or more atoms _________ together | joined |
