Across
- 1. The organic component of soil, formed by the decomposition of leaves and other plant material
- 5. Characteristics that define something's nature
- 7. Discomfort felt in the stomach when having trouble digesting food
- 10. Tiny organisms that can cause decay or disease
- 11. Molten rock that erupts onto the Earth's surface
- 12. Molten rock beneath the Earth's surface
- 13. rocks Rocks formed from cooled magma or lava
- 15. The process of making an acid and alkali form a neutral solution
- 19. indicator A tool that shows the exact pH value of a substance
- 20. A type of fine-grained natural soil material
- 21. A tool that shows if something is acidic or alkaline
- 25. To break down food in the stomach
- 27. A type of hard rock made of quartz, mica, and feldspar
- 28. The process of breaking down or rotting
Down
- 2. Material that settles to the bottom of a liquid
- 3. Solid materials whose atoms are arranged in a repeating pattern
- 4. To respond chemically when two substances come into contact
- 6. A type of soil with coarse particles
- 8. Made to be neither acidic nor alkaline
- 9. matter Material derived from living organisms
- 14. Not acidic or alkaline
- 16. A substance that can neutralize an acid
- 17. When a volcano releases lava, ash, and gases
- 18. rock Rock formed from compressed or cemented layers of sediment
- 22. The outer layer of the Earth
- 23. A lab instrument used to measure and transfer liquids accurately
- 24. Scientists who study the Earth
- 26. Natural substances found in rocks