Across
- 3. used mathematics and geometry to prove that the planets orbited the sun in an elliptical path
- 4. known for the improvements he made to the telescope
- 9. described the forces of gravity and was famous for his three laws of motion
- 10. a community of living organisms and their interaction with the environment
- 11. A source of energy that cannot be used up
- 13. the curved path of the earth
- 14. energy from moving water
Down
- 1. energy that is causes a change or movement
- 2. to move in a circular pathe around a centre
- 5. energy that is stored in a system
- 6. suggest that the sun was in the centre of the solar system
- 7. the branch of science that deals with space and the universe as a whole
- 8. to return or send back
- 11. to turn on an axis or centre
- 12. to take in or soak up