Across
- 2. a natural satellite which orbits the Earth and is about one quarter the size of Earth
- 3. Earth’s closest star and the center of our Solar System
- 7. the resistance (or stopping) of motion when one object rubs against another
- 8. A small rocky body orbiting the sun
- 10. to be taken in by something
- 11. the Earth moving around the sun; this takes Earth 365 ¼ days (one year) to complete
- 12. a force that pulls all objects toward Earth
- 15. Materials that allow all light to pass through
- 18. to put forth effort to do something
- 19. when light bounces off an object
- 20. the highness or lowness of a sound
- 22. A celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such.
- 25. the way in which the Earth slants on its axis
- 26. back-and-forth movements that create sound waves
- 27. Any circle drawn around Earth divides it into two equal halves
Down
- 1. The collection of eight planets and their moons in the orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
- 4. Materials that let some light pass through
- 5. An object consisting of a nucleus of ice and dust, may have a tail.
- 6. the loudness or softness of a sound
- 9. The curved path of a celestial object or spacecraft around a moon, planet, or star
- 13. the Earth spinning around its axis; this takes Earth 24 hours (1 day) to complete
- 14. A small body of matter from outer space that enters the earth’s atmosphere , becoming incandescent as a result of friction and appearing as a streak of light.
- 16. light bending when it hits a new material
- 17. it is the path the Earth takes around the sun. The Earth makes an elliptical (almost circular) shape orbit.
- 21. Materials that do not allow any light to pass through
- 23. an imaginary line that passes through the North and South poles
- 24. any motion that changes the direction of an object
- 28. how fast or how slow an object moves