Across
- 4. a boundary where plates slide past each other
- 8. the layer of gases surrounding Earth
- 9. a trait that helps an organism survive in its environment
- 13. all water on Earth
- 15. when the Moon blocks the Sun from view
- 16. one organism benefits while the other is harmed
- 20. the process where organisms with favorable traits are more likely to survive and reproduce
- 23. a close relationship between two different species
- 24. differences in DNA among individuals in a population
- 26. respiration the process cells use to release energy from food
- 29. the organelle where photosynthesis occurs
- 30. the force that pulls objects toward each other
- 31. the unit used to measure force
Down
- 1. the process plants use to make food using sunlight
- 2. the solid part of Earth including rocks and land
- 3. a large piece of Earth’s lithosphere
- 5. the passing of traits from parents to offspring
- 6. both organisms benefit
- 7. one organism benefits and the other is unaffected
- 10. all living things on Earth
- 11. the organelle where cellular respiration occurs
- 12. a thin barrier that controls what enters and leaves the cell
- 14. the path an object follows around another object
- 17. a rigid outer layer that provides support and protection
- 18. the tendency of an object to resist changes in motion
- 19. a characteristic of an organism
- 21. the science of classifying organisms
- 22. a boundary where plates move apart
- 25. when Earth blocks sunlight from reaching the Moon
- 27. the main energy-carrying molecule in cells
- 28. a boundary where plates move toward each other