Across
- 6. the distance light travels in one year
- 7. a graph that shows how distance and time are related to the motion of an object
- 9. space debris that burns up when it enters Earth's atmosphere
- 11. a type of wave that needs a medium to travel
- 13. a type of wave that moves at a right angle
- 18. how far an object is from the original starting point
- 19. space debris that impacts Earth's surface
- 23. terrestrial, rocky planets
Down
- 1. educated guess, if-then statement
- 2. have two properties, magnitude and direction
- 3. a repeated disturbance or vibration that transmits energy, but not matter
- 4. the tendency of an object to resist a change in motion
- 5. a material through which waves can travel
- 8. a type of wave that does not require a medium to move
- 10. planets known as the gas giants
- 12. the highest point on a wave
- 14. how far an object has traveled
- 15. v=d/t, distance over time
- 16. the name of the galaxy we live in
- 17. a type of wave that moves in the same direction as the energy
- 20. a force that slows objects to a stop, depends on the type of surface
- 21. a collection of stars, gas, and dust
- 22. gravitational attraction to Earth