| A | B |
|---|
| minerals | a solid object that is formed in nature and has never been alive |
| hardness | the measure of how difficult it is for a mineral to be scratched |
| characteristics | a special feature that makes objects different from each other |
| elements | the parts that make up minerals |
| streak | color left behind by a mineral when it is rubbed against a rough white tile |
| rock | a naturally formed solid made of grains of one or more minerals |
| attributes of rocks | shape, color, texture |
| texture | how something feels when you touch it |
| soil | the loose surface material of the earth in which plants grow |
| clay | soil with very, very tiny grains of rocks |
| sand | soil with very large grains of rock that you can see |
| attributes of soils | texture, grain/particle size, color, absorption |
| humus | part of soil that is made up of parts of dead plants and animals |
| topsoil | the first layer of soil containing humus |
| loam | soil that is a mixture of humus, sand, silt, and clay; potting soil |
| weathered rock | rock that has been changed by wind and water |
