Across
- 3. Light and heat energy from the sun. This energy also causes winds and drives the water cycle.
- 5. Electricity generated from the movement of the tides.
- 6. Energy stored in the nucleus of an atom.
- 8. A renewable resource made from things that were once alive.
- 9. Reduction in the number or quantity of something.
- 10. Natural situation in which heat is retained in Earth’s atmosphere by carbon dioxide, methane, water vapor, and other gasses.
- 11. Rain that is more acidic than normal, caused by pollutants in the air (such as burning fossil fuels)
- 14. Relying strongly on a single energy source.
- 15. Energy generated from the kinetic energy of moving air.
- 18. A colorless, odorless gas produced by burning carbon and organic compounds and be respiration.
- 19. Able to meet the current demand for a resource without depleting the future supply
- 20. A renewable resource that comes from inside the Earth.
Down
- 1. Electricity produced by the kinetic energy of water moving over a waterfall or dam.
- 2. Energy-rich substances formed from the remains of once living organisms.
- 4. Energy that comes from sources that do not use up natural resources or harm the environment and are used in place of fossil fuels.
- 7. A gradual increase in the temperature of Earth’s atmosphere.
- 12. To save or reduce the use of something
- 13. Resources that are constantly being resupplied.
- 16. Resources that are being used up faster than they are made.
- 17. Harmful substances in the air, water or soil.