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Birds

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    Why do birds fly
  •   Study   Slideshow
  • What are changes to an animal's body that help it survive. adaptations or drag
    adaptations
  •  15
  • The force of air pushing against a flying animal or object . drag or lift
    drag
  •  15
  • Air pressure under a flying animal or object that lifts it higher. lift or thrust
    lift
  •  15
  • Forward movement by a flying animal or object. thrust or drag
    thrust
  •  15
  • What is the forward movement of a bird called? Thrust or lift
    Thrust
  •  15
  • If air causes drag on a bird, what causes drag on a fish.
    Water
  •  15
  • Adaptations help all animals fly.
    False
  •  15
  • Birds bones weigh less than people's bones.
    True
  •  15
  • Wings are the only things needed to fly.
    False
  •  15
  • Which one of these is an adaptation to help birds fly. feathers or hair
    feathers
  •  15
  • Which one of these is an adaptation that help birds fly? hollow bones or feet
    hollow bones
  •  15
  • Which one of these is an adaptation that helps birds fly? fat or strong muscles
    strong muscles
  •  15
  • Where is air pressure the lowest, over or under a birds wing?
    over
  •  15
  • Where is air pressure the greatest, under or over a bird's wing?
    under
  •  15
  • A thermal current is a current of warm air. (true or false)
    true
  •  15
  • Birds flap more when they ride thermal currents? (true or false)
    false
  •  15