Across
- 3. A measure of heat, influences weather and climate.
- 5. A natural satellite that orbits a planet, like Earth's companion.
- 7. Our home planet, the third one from the Sun.
- 8. The star at the center of our solar system.
- 10. A chemical element essential for life, found in all living organisms.
- 11. The path a planet or moon follows as it revolves around a star or planet.
- 13. The force that attracts objects towards the center of a planet or star.
- 14. The mixture of gases, primarily oxygen and nitrogen, that we breathe.
- 15. The "Red Planet," known for its dusty surface.
- 16. What living organisms are made of, dependent on water and oxygen.
- 18. H2O, essential for life on Earth.
- 19. A large celestial body that orbits a star.
Down
- 1. The layer of gases that surrounds a planet.
- 2. The second planet from the Sun, often called Earth's "sister."
- 4. The ability to do work or cause change, essential for all processes.
- 6. The ability to live and continue existing in certain conditions.
- 9. The state of the environment or atmosphere at any given time.
- 11. A gas that humans breathe, essential for life.
- 12. The force exerted on an object, especially in the atmosphere.
- 17. The vast, empty area that exists between stars and planets.