Use the following Web sites to answer the questions.

What's in a Wing?
http://www.phxskyharbor.com/skyharbr/kids/science.html

What Makes an Airplane Fly?
http://www.allstar.fiu.edu/aero/fltmidfly.htm

K-8 Aeronautics Internet Textbook
http://wings.ucdavis.edu/

Off to a Flying Start
http://learn.arc.nasa.gov/products/products01/ltp_html/individual_pages/offtoflystart.html

Science Fun with Airplanes
http://www.ag.ohio-state.edu/~flight/

1. _________ is the upward force that opposes the force of gravity.

2. Lift occurs because the air pressure on the top surface of an airfoil (wing) is ______ than the air pressure beneath the airfoil.

3. _________ keeps a plane on the ground or pulls a plane to earth when it is in the air.

4. The pull of gravity equals the _________ of the plane.

5. Lift must be ________ than gravity in order for the plane to stay in the air.

6. The force that moves a plane forward is called __________.

7. The _________ helps produce thrust on the plane.

8. __________ is the force that opposes thrust. It is also known as air resistance.

9. For a plane to move forward, it must have _________ thrust than drag.

10. An airplane must be stable in three directions. Add the word that satisfies the definition.

_________ - tip sideways

_________ - nose up or down

_________ - turn right or left

Words to choose from:

lift, drag, thrust, gravity, yaw, pitch, roll, greater, more, higher, weight, engine