TA Rocks, Minerals, and Soil
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22 terms
Terms | Definitions |
|---|---|
 clay | type of soil that turns very hard when dry |
| composting | process for making decomposing plant matter necessary for soil |
| fossil | the trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock |
| horizons | Layers of soil |
| humus | decaying plant and animal matter |
| inexhaustible resources | resouces that humans and use and never use up |
| crystals | atoms arranged in repeating patterns |
| luster | the way a mineral reflects light |
| minerals | natural nonliving solids made of one or more elements |
| relative dating | figuring out the order in which events occurred |
| rock cycle | the process of rocks forming , wearing down, and them forming again |
| silt | slippery soil that can hold water |
| soil | a mixture of rock, plant material , animal matter, water, and air |
| soil conservation | preserving soil by using it wisely |
| streak | the true color of a mineral |
| water retention | how well soil holds water |
| 3 types of rocks | igneous, metamorphic, sedimentary |
| sedimentary rocks are formed by | loose material pressing together and forming over time |
| oxygen is a | gas |
| soil is important to animal life because | it supports plant life which is essential in the food chain |
| soil can be lost to erosion by | animals that eat all of the plants |
| topsoil can be preserved by | planting trees and other plants |
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