Across
- 2. type of rock forms when magma cools and hardens
- 4. soil helps do this to the water that seeps into the ground
- 8. type of material that first exist before soil can form
- 9. the type of rock formed by heat and pressure
- 11. a very shiny and glass-like igneous rock formed this way
- 12. a chemically pure substance
- 16. can prevent erosion by practicing soil conservation
- 17. a mixture of minerals, water, air, and organic matter
Down
- 1. the only type of rock that is NOT produced by either heating or cooling
- 2. not consisting of or deriving from living matter.
- 3. soil texture is made of large particles and feels gritty or rough
- 5. type of soil is made of nearly equal parts of sand, clay and silt
- 6. rocks have a mixture of this of minerals
- 7. a mineral occurs this way
- 10. the most important organisms to the formation of soil
- 13. soil texture is smooth and hard when dry but sticky when wet
- 14. the decomposed organic matter that forms the very top layer of soil
- 15. rocks can contain these, but minerals do not