Across
- 3. Heat the heat required to convert a solid into a liquid or vapor, or a liquid into a vapor, without change of temperature
- 5. dissolved salt content of a body of water
- 6. the weather conditions
- 7. the process of a substance in a liquid state changing to a gas state
- 9. Nutrients Carbon dioxide, iron, nitrogen and phosphorus
- 14. produced by separation of the components of light by their different degrees of refraction according to wavelength
- 16. a measure of acidity and alkalinity of a solution
- 18. a steep temperature gradient in a body of water
- 19. the basic unit of a chemical element
- 20. Capacity the number of heat units needed to raise the temperature
Down
- 1. the mass per unit volume
- 2. a system or formation of layers, classes, or categories
- 4. the action of breathing
- 8. a poisonous, combustible non metal that exists in two common forms
- 10. the degree or intensity of heat present in a substance
- 11. Transmission When light moves through a transparent material
- 12. a weak bond between two molecules resulting from an electrostatic attraction
- 13. a strong salinity
- 15. able to dissolve other substances
- 17. Molecule a molecule that has a partial positive charge and a partial negative charge