Across
- 3. cycle the cycle of processes by which water circulates between the earth's oceans, atmosphere, and land
- 5. attraction electric currents as well as magnets
- 7. phases rises with the side that faces Earth fully exposed to sunlight
- 8. prevention of wasteful materials
- 10. effects indicate adverse effects produced by poisons
- 13. take note of or detect
- 15. an animal's young
- 16. layers of gases surrounding the planet
- 17. cycle the series of changes in the life of an organism
- 18. the state of being on or moving
- 20. rain, snow, sleet, or hail that falls to the ground
- 21. change reversible change in the physical properties of a substance
- 22. resources materials or substances such as minerals, forests, water
- 24. an individual animal, plant, or single-celled life form
- 25. physical substance
Down
- 1. no longer in existence
- 2. the action of rotating around an axis or center
- 3. worn away or altered by long exposure to the air
- 4. method systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses
- 6. the process by which green plants and some other organisms use sunlight
- 9. system the collection of eight planets and their moons in orbit around the sun
- 10. an animal that naturally preys on others
- 11. features formation or geological formation
- 12. strength or energy as an attribute
- 14. conserved quantity
- 19. the presence in or introduction into the environment of a substance or thing that has harmful
- 20. properties characteristic of matter that can be observed and measured without changing the chemical identity
- 23. an animal that is hunted and killed by another for food