Could Humans Ever Really Fly?

Words to Know

**Lift**

The upward push made by a wing's curved shape

"Lift is what pushes a plane's wings up into the sky."

**Thrust**

The forward push that keeps something moving

"An engine makes thrust to push the plane forward."

**Aerodynamics**

The science of how air moves around a shape

"Aerodynamics tells us why curved wings work so well."

**Glide**

To fly smoothly downward without flapping or an engine

"An albatross can glide for hours over the ocean."

**Propeller**

Spinning blades that push air to make thrust

"A propeller spins fast to pull a small plane forward."

Check What You Learned