Investigating Flight

A bird's wing is an example of an airfoil.

• True

• False

The Egyptians were the first people to use kites.

• True

• False

Hot air balloons were invented before airplanes.

• True

• False

A helicopter is a lighter-than-air device.

• True

• False

Another name for a dirigible is a blimp.

• True

• False

An area of irregular motion in a flowing fluid.

• gravity

• fluid

• turbulence

• elevator

A device with a revolving hub and radiating blades that attaches to the engine to propel an airplane.

• aileron

• propeller

• airfoil

• flap

The movable portion of an airplane's wing that helps the airplane slow down when landing or gives it more lift on takeoff.

• Flap

• Aileron

• Elevator

• Airfoil

A hinged flat section on an airplane's tail that can be adjusted to make the airplane to go up or down.

• propeller

• flap

• aileron

• elevator

A surface shaped to produce lift when air moves over and around it.

• gravity

• airfoil

• aileron

• flap