Across
- 1. the direction of an object moving
- 3. all stars start as this, large cloud of gas and dust
- 4. earliest stages of a stars life
- 7. height of a wave
- 9. a change in speed of an object over time
- 10. the highest point of a wave
- 12. a substance that a wave passes through
- 13. how the northern lights are created
- 16. a complete stop
Down
- 2. light waves
- 5. when a main sequence star begins to run out of fuel
- 6. push, pull or twist
- 8. sound waves
- 11. remains of high mass stars
- 14. something that is slowing down
- 15. massive stars become this when they die
- 17. the lowest point of a wave