Across
- 4. the force that attracts a body towards the centre of something
- 5. easy to confuse with weight
- 9. the amount or degree of cold or heat
- 13. a large, round object in space that moves around the sun or another star
- 14. the star of our Solar system
- 15. is the physical substances that exist in the universe.
- 16. the smallest particle of an element
- 18. the ability to do a work
- 19. the changement from solid to liquid
Down
- 1. you can find it as "Ti" in the periodic table
- 2. the planet that we live on
- 3. it emit light by it self
- 4. a substance in a form that is like air and not solid or liquid
- 6. is a fluid matter
- 7. easy to confuse with mass
- 8. the gas inside the ballons
- 10. one of several very small planets that move around the sun
- 11. a simple substance that you cannot reduce to smaller chemical parts
- 12. the gases around the earth
- 17. a unit for measuring energy