Across
- 3. Water molecules stick together
- 6. The process by which the absolute age of a rock is determined by measuring the amount of radioactive isotopes present in the rock or rock sample
- 8. Due to strong cohesive forces between water molecules, they create a smooth sheet at the surface of water
- 11. A measure of how acidic, neutral or basic a substance is. For good water quality, water should have a measure close to 7
- 14. The ability of a substance to allow liquids and gasses to pass through it
- 17. This law states that the oldest rocks lie on the bottom and the youngest rocks on the top of any undisturbed sequence of sedimentary rocks
- 19. The amount of mass in a given volume
- 20. Water molecules sticking to other molecules/surfaces
Down
- 1. The forces adhesion and cohesion allows water to move up and through materials
- 2. Water is known as this because it can dissolve any polar substance
- 4. A molecule composed of one nitrogen atom and three oxygen atoms. Found in fertilizers and stimulate the growth of plants and algae in the water
- 5. The enrichment of an aquatic ecosystem with nitrates, phosphates, or both
- 7. The theory that explains how large pieces of the Earth's outermost layer move and change shape
- 9. The amount of heat needed to increase the temperature by 1 degree celsius
- 10. The amount of gaseous oxygen dissolved in water. Normal range is 5-10 ppm
- 12. Rapid increase or accumulation in the population of algae in a water system
- 13. A polar molecule has a negative end and a positive end. Water is a polar molecule
- 15. A fossil found in a narrow time range but widely distributed around the earth; used to date rock layers and find the relative age
- 16. The measure of clarity in the water. High means the water is dark and murky
- 18. The upward force exerted in water. Calculated by water displacement