Across
- 3. The forces that causes unsupported objects to fall
- 4. The unit of measure for force
- 6. The force exerted on a mass due to gravity
- 8. A type of friction that slows down objects moving in water
- 10. The amount of force of gravity an object exerts
- 13. The equipment used to measure force
- 16. The part of the boat that is submerged in water
- 17. The planet on which we live
- 20. The empty area outside Earth’s atmosphere, where the planets and the stars are
- 22. When an object has been shaped to reduce friction in air or water
- 24. The measure of how much matter is in an object, with the unit of grams or kilograms
- 26. A simple machine that has a grooved wheel that spins on an axle
Down
- 1. The path planets take around the sun
- 2. A change in direction
- 5. Anything in an investigation (or experiment) that can be controlled or changed
- 7. A wheel with teeth (or cogs)
- 9. The frictional force air exerts against an object
- 11. Causes a change in motion of an object, so that the object moves, or slows down or speeds up, or changes direction
- 12. Devices designed to make it easier to move objects (simple machines)
- 14. The rise and fall of sea levels caused by the sun and moon’s gravitational pull
- 15. A force between two surfaces that are sliding, or trying to slide across each other
- 18. A simple machine that uses interlocking cogging wheels
- 19. A type of force used to make things move
- 21. A simple machine that moves on a pivot point
- 23. A rod that fits through the center of a wheel
- 25. A type of force used to make things move
