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Ch. 4Ch. 4Sec. 2 The Physics of Bird Sec. 2 The Physics of Bird

FlightFlight

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Why do birds fly south?

Because it is too far to walk!

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How Air Moves Across a Wing

Air moves faster across wing’s upper surface than its lower surfaceAir pressure caused by air molecules pushing

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The faster air moves, the less pressure it

exerts.

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How Air Moves Across a Wing

Difference in pressure above & below bird’s wing produces upward force (lift) that causes wing to rise

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lower

higher

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types of flight

flappingsoaring/gliding

diving

uses a lot of wing movement

& energy

move upwardon rising warm

air currents

Does not use lift

Use fallingcurrents

of cool airTo coast

downward

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Birds with different types of flight have wings that are shaped very

differently.Many seabirds, like albatrosses and seagulls, have long, narrow pointed wings for gliding long distances over the ocean.

Long, broad eagle wings have a large surface area for soaring on rising warm air currents.

Short rounded wings allow pheasants rapid takeoffs, good maneuverability, and short glides.

Similar to a high speed jet, swallows have relatively small, narrow, tapering wings.

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Why do seagulls live in the sea?

Because if they lived in the bay, they'd be bagels!!!

04/10/23 10Built to Fly: How Birds Are Adapted for Flight video clip

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What is North America's fastest bird?

• The Peregrine Falcon regularly attains speeds of about 40-60 miles per hour and has been clocked during its steep dives at 175 miles per hour!

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What do you call two Peregrine falcons fighting over a pigeon?

A squabble!!

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What do you call two happy falcons?

a Pair-of-Grins

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This is so much easier than the old way!