Across
- 2. bird ______ are lighter than jaws, teeth and nose would be
- 3. feathers that help with lift and soaring
- 9. force over an area
- 10. wings that enable birds to soar or fly for a long time without beating their wings
- 11. humans cannot fly because their chest and arm _____ are not strong enough
- 12. wings that have long main feathers extending out, forming slots
- 14. wings that allow a bird to take off quickly and fly at high speeds for a long time
Down
- 1. there are 4 major types of bird wing ________
- 2. ______'s principle says that, as the speed of a fluid decreases, pressure increases
- 4. the shape of the cross section of a wing that helps create lift
- 5. feathers that propel the bird forward and help it steer
- 6. when birds flap their wings, the front is slightly _______ than the back
- 7. bird ______ are light and hollow, with cross pieces for strength
- 8. force that creates a forward push
- 10. force that creates and upward push
- 13. another name for "leading edge" feathers