| A | B |
|---|
| soil | small bits of rock, plant and animal remains, and live animals |
| weathering | natural process that breaks rocks into smaller pieces |
| sedimentary rock | made up of layers |
| talc | very soft mineral |
| diamond | 10 on the hardness scale |
| quartz | 7 on the hardness scale |
| mica | mineral that forms rocks |
| minerals | different kinds of crystals that make up rocks |
| fossils | formed from bones and leaves |
| obsidian | forms when lava cools very rapidly following the eruption of a volcano |
| metamorphic | rock formed from heat and pressure, marble |
| igneous rock | other rocks melt and form this rock |
| causes weathering | water, wind, ice, plant roots |
| soil is made up of | small bits of rock, decaying plants and animals, and tiny life forms |
| fossils tells us | what animal looked like, what the environment was like and how the environment changed |
| soil is formed when | weathering causes rocks to break up from water and plant roots |
