Across
- 1. He termed "laws of ecology".
- 4. Element making up about 78% of the atmosphere.
- 5. Explains why things happen.
- 6. Corrosive rain caused by rainwater falling through sulfur dioxide gas.
- 11. Liquid surface water becomes vapor.
- 13. Important inorganic form of phosphorus.
- 14. Area where organisms interact.
- 15. Organized body of language obtained by study.
- 19. Cycle involving rocks and sediments.
- 23. Study of the physical and biological factors in the environment.
- 24. Group of the same species in one area.
- 26. Compounds from dead plants and algae that has fossilized over millions of years.
- 27. Condensed water falling to Earth.
- 28. An element present in all organic molecules.
- 29. Where species that inhabit a particular area.
Down
- 1. Central characteristic of the scientific method.
- 2. Prediction based on observation.
- 3. Process that takes away mineral components from saline water.
- 7. Non-living things.
- 8. Common name for algal blooms.
- 9. Process where a gas cools down and turns into a liquid.
- 10. Process where sulfur falls directly from the atmosphere.
- 12. The ability to move things, do work, or transfer heat.
- 16. Involve in the formation of proteins.
- 17. The ability to move things, do work, or transfer heat.
- 18. Comprises all types of water resources.
- 20. All living and non-living components in an area.
- 21. Study of energy.
- 22. Essential element for the molecules of living things.
- 25. Living things.