| A | B |
|---|
| rock | a natural, solid, non-living material made of one or more minerals |
| mineral | natural material that forms from of non-living matter |
| igneous rock | rock that forms when melted earth materials cool and harden |
| sedimentary rock | rock that forms when small pieces of earth material collect and become bound together |
| metamorphic rock | rock that forms when existing rock is changed by heat and pressure |
| soil | the part of Earth's surface consisting of humus and weathered rock in which plants grow |
| decay | to break down, or rot |
| nutrient | thing plants need in order to grow |
| loam | soil that contains a mixture of humus and mineral materials of sand, silt and clay |
| matter | anything that takes up space and has mass |
