Across
- 1. An aeroplane has two whats?
- 4. The force pulling things down towards the Earth
- 7. Make something greater in size or amount
- 10. Put oil or other liquid between two surfaces
- 11. Has many bumps and hollows
- 12. To move smoothly across a surface
- 13. To pull something upwards
- 15. Describes an object designed to reduce drag and air friction, eg. the nose of an aeroplane
- 17. Go slower
Down
- 2. The outside part or top layer of something
- 3. The moving blades of a helicopter
- 5. Force pushing on something
- 6. The force that moves a plane forwards
- 8. Go faster
- 9. The force created when one surface moves against another
- 11. Make something less in size or amount
- 14. Like strength or power
- 16. Air friction that slows down a plane, car etc.