Across
- 3. a measure of matter
- 7. study of organisms in their environment
- 8. a large cloud of gas and dust in interstellar space
- 10. a treeless plain found in the artic
- 11. a instrument that measures temperature
- 12. a giant ocean wave that forms after volcanic eruption
- 14. a relatively small, rocky body that travels through space
- 17. a meteoroid that reaches earths atmosphere without burning up
- 19. a substance that reduces the transfer of heat,sound,etc
- 21. only eats meat
- 22. a bright streak of light that results when a meteoroid burns in earths atmosphere
- 23. an electric discharge
- 24. a diagram that shows feeding relationships
- 27. the transfer of energy as electromagnet waves
- 28. a collection of small water droplets or ice formed when air cools
- 29. the movement of air caused by air differences
Down
- 1. a collection of stars, dust, and gas
- 2. a natural or artificial body that revolves around a planet
- 4. the potential difference between two points; measured in volts
- 5. a organism that breaks down things
- 6. a small body of ice, rock, and cosmic dust
- 9. the energy of an object that is in motion
- 13. the movement of deep, cold, nutrient-rich water
- 15. a area that is dry and has little or no plant life
- 16. nonliving thing
- 18. only eats plants
- 20. a pathway of energy transfer through various organisms
- 24. a force that opposes motion between two surfaces that are in contact
- 25. eats both plants and animals
- 26. living thing