Across
- 3. to get Slower (verb)
- 5. a system of ideas intended to explain something (noun)
- 8. to pull something closer to an object (verb
- 9. likely to change (adjective)
- 11. the heaviness of a person or thing (noun)
- 12. the ability to float in water (noun)
- 15. an adult female human being (noun)
- 16. Italian astronomer (noun)
- 18. pressure acting on the object due to gravity (pl .noun)
- 19. to push something away from an object (verb)
- 20. a system of parts working together in a machine (noun)
Down
- 1. wheel with a grooved rim around which a cord passes (noun)
- 2. the use of force to oppose something (noun)
- 4. the force that attracts a body towards the centre of the earth (noun)
- 6. movement towards or attraction to something (noun)
- 7. English scientist who discovered the theory of gravity (noun)
- 10. to get faster (verb)
- 13. more than one; several (determiner)
- 14. exhibiting or relating to magnetism
- 17. a statement or account that makes something clear (noun)