| A | B |
|---|
 | erosion by gravity |
 | erosion by wind |
 | streak test |
 | hardness test |
 | metamorphic rock |
 | sedimentary rock |
 | erosion by ocean waves |
 | erosion by a river |
 | rock formed by magma that cooled slowly |
| layer of soil with the most humus | topsoil |
| layer of soil that is mostly inorganic | subsoil |
| carbonation | type of chemical weathering that forms caves in limestone |
| oxidation | type of chemical weathering that causes rust |
| acid rain | type of chemical weathering caused by pollution |
| frost action | type of physical weathering caused by ice |
| root pry | type of physical weathering caused by plants |
| abrasion | type of physical weathering where rocks scrape |
 | igneous rock made from lava that cooled quickly |
 | erosion by glacier |
| luster | the way a mineral reflects light |
