Question

birds easily fly in air,which physical aspect of air is revealed by this

Answer 1

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Answer 2

Answer:

ARTICLE How birds fly EXPLORE

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One of the requirements for heavier-than-air flying machines is a structure that combines strength with light weight. This is true for birds as well as planes. Birds have many physical features, besides wings, that work together to enable them to fly. They need lightweight, streamlined, rigid structures for flight. The four forces of flight – weight, lift, drag and thrust – affect the flight of birds.

Godwits – designed to fly

As with other flying birds, godwits have many physical features that work together to enable them to fly. They need lightweight, streamlined, rigid structures for flight.

Physical features

Flying birds have:

lightweight, smooth feathers – this reduces the forces of weight and drag

a beak, instead of heavy, bony jaws and teeth – this reduces the force of weight

an enlarged breastbone called a sternum for flight muscle attachment – this helps with the force of thrust

light bones – a bird’s bones are basically hollow with air sacs and thin, tiny cross pieces to make bones stronger – this reduces the force of weight

a rigid skeleton to provide firm attachments for powerful flight muscles – this helps with the force of thrust

a streamlined body – this helps reduce the force of drag

wings – these enable the force of lift.