Across
- 3. the emission of energy as electromagnetic waves or as moving subatomic particles,
- 4. a substance made from a chemical reaction
- 5. the substances that combine in a chemical reaction
- 6. the basic unit of matter
- 8. Bang the rapid expansion of matter from a state of extremely high density and temperature
- 9. operating well without much waste.
- 10. explosive warhead carried by a missile.
- 11. a chemical reaction between a fuel and oxygen
- 12. send into the air
- 14. the figure made by two lines coming from a single point.
- 16. actions taken to make or do something.
- 20. make (someone) do something against their will.
- 21. operating well without much waste.
- 22. to discover or notice.
- 24. the line where the earth and the sky appear to meet.
Down
- 1. to change into a different form or state.
- 2. anything having mass and taking up space
- 4. a perceptible occurrence or fact.
- 7. how far something is
- 9. they show variation in data on a graph
- 13. that which follows; result.
- 15. the force by which all objects in the universe are attracted to each other.
- 17. Move quickly
- 18. a rearrangement of atoms into new substances
- 19. to perceive or make out.
- 23. useable power such as heat or electricity