Birds and Airplanes oh my!

12345678910111213141516
Across
  1. 1. one of the forces a bird must overcome to take flight, It is what keeps you on the ground
  2. 4. force that pushes an object forward through the air
  3. 6. a birds wing bones are ___ and light which makes flight easer
  4. 8. this part of the bird is especially suited for mealtime
  5. 9. large birds like vultures and eagles save energy by ____ instead of flapping their wings
  6. 11. humans replicated the shape of the wing to create the wing of ____.
  7. 13. this is what makes birds different than other animals.
  8. 14. a force that causes a bird to rise in the air
  9. 15. the type of feathers that help a bird keep warm
  10. 16. this part of the bird grinds and crushes hard pieces of food like seeds
Down
  1. 2. faster air travels over the top of an airplane wing, reducing ____ pressure so the plane rises off the ground
  2. 3. a force that works against objects in motion
  3. 5. if a bird only flapped its wings up and down this would happen
  4. 7. a type of vision birds have when both eyes focus on the same object
  5. 10. the type of feathers that help a bird to steer while flying
  6. 12. bird feathers are made of this material
  7. 15. a bird pushes itself forward on the ____ which creates thrust