Why can birds fly?

If you are a person who love to know animal facts and want to know more. Here is answers some question about why birds can fly:

The pressure exerted down by fast moving air (red arrows) is less than the pressure exerted up by slow moving air (green arrows).

If you tried the paper activity from the front of this article, you might have been surprised by what happened. In most cases a person would think the paper would go down and not lift up when they blow air across the top.

It may not be what you would expect, but it is what birds and planes do to lift off the ground and fly. Blowing faster-moving air above the sheet paper lowered the air pressure above the paper. Now the air pressure below the paper is higher and creates lift. Lift does exactly what it sounds like; it lifts objects off the ground when everything is just right

Bird bodies are made to fly. They have light bones, strong legs, and specially shaped wings. Flying helps birds get away from animals that want to eat them, and makes them better hunters, too. Flying also helps them travel from cold places to warm places, called migration(my-GRAY-shun).

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.

Related to: elephant facts for kids

Posted by allawesomefactsforkids