Across
- 2. The body at the center of our solar system is –
- 5. In 2006, the International Astronomical Union demoted which planet to dwarf planet status?
- 7. What is the largest component of the Solar System from this list: Jupiter, Moon, Sun, Earth
- 8. The hard, rocky planet that is the smallest and closets to the sun is –
- 9. Which planet has the most gravity?
- 11. Besides Earth, humans have also landed on which celestial object?
- 14. Because of technology A _____________ (sun-centered) view was accepted.
- 16. Is known for its amazing rings
- 17. The force of gravity between objects is greatest when –masses are ________ and objects are close together
- 20. What invention did scientists use to make observations that challenged the geocentric model of the solar system?
- 21. The moon orbits the Earth because of the _____________- attraction between the moon and Earth.
Down
- 1. The millions of rocky objects revolving around the sun, mostly between Mars and Jupiter, that are too small to be planets are called –
- 3. The four inner planets of the Solar System are Mercury, ____________, Earth, and Mars
- 4. Is the biggest planet
- 6. A scientific article is about a solar system component that is similar to a planet, but is not large enough to clear its orbital region of other objects. What is the article about?
- 10. What is made of ice and dust, travels in a long elliptical orbit around the sun and has a tail that points away from the sun?
- 12. How are all the inner planets similar to each other?
- 13. Is the hottest planet
- 15. What would happen to Earth if the sun’s gravitational force suddenly stopped? Earth would leave its orbit and travel in a _____ _____
- 18. Is the farthest planet
- 19. What planet is known as the Red Planet?