Why does gravity keep us on Earth but let birds fly?

Gravity is like a big invisible rope that pulls everything toward Earth, including you and me!

Imagine you're playing with a ball on a string. When you swing it around, the string keeps the ball from flying away. Gravity is like that string, it keeps us from floating off into space. But why don’t birds float away too?

Birds have something special: wings! Think of wings like tiny fans that push air down when a bird flaps them. That pushes the bird up, just like how you jump higher when you push the ground down with your feet.

So gravity pulls birds down, but their wings help them push up, and that’s enough to make them fly! It’s like being on a seesaw: one side goes down while the other goes up. Birds are good at balancing that pull from gravity with their strong wing flaps.

You might feel gravity more because you’re heavier than a bird, but birds are light and have wings, so they can float right above us! Gravity is like a big invisible rope that pulls everything toward Earth, including you and me!

Imagine you're playing with a ball on a string. When you swing it around, the string keeps the ball from flying away. Gravity is like that string, it keeps us from floating off into space. But why don’t birds float away too?