Flight Unit Test

To make a hot air balloon stay up in the air, the pilot must

• fire the burner regularly.

• check the way the wind is blowing

• Open the vent at the top of the balloon.

• None of the above

Hot air balloons descend(go down) because

• the air inside cools and becomes more dense than the air outside.

• air inside the balloon is losing compression.

• lift on the balloon is greater than the force of gravity

• air inside the balloon cools and becomes less dense than air outside the balloon

Which statement about parachutes is correct?

• The two forces that act on a parachute are gravity and wind resistance.

• Most parachutes made of cotton.

• The shorter the (shroud lines), the slower the parachute will fall.

• Parachutes have a Velcro vent on top to control speed

Circular parachutes have a hole in the top because

• it stabilizes the parachute so it does not wobble.

• it is easier to see what is above you.

• it keeps the parachute from falling to fast.

• All of the above.

Which control surfaces control pitch?

• The horizontal stabilizer.

• The elevators

• The ailerons

• The rudder

Which one of these is not one of the 4 forces of flight?

• Lift

• Drag

• Thrust

• Yaw

Which statement is false about rockets in space?

• Streamlining will not affect how fast they travel as there is no air pressure or wind resistance in space.

• They fly much faster if they are designed with wings.

• They need rockets mounted on the side to have the ability to turn

• They carry an oxidizer in the form of liquid oxygen to burn their fuel.

The two things that affect the descent rate of a falling object are

• thrust and gravity.

• wind resistance and drag.

• gravity and wind resistance.

• gravity and drag.

The fastest a dropped object will fall is approximately 200 km/ hour. The term for this is

• Bernoulli’s Principle.

• Archimedes Principle

• Terminal Disorder

• Terminal Velocity.

Which one of these is classified as a floater?

• A dirigible (blimp)

• a kite

• a bee

• an eagle.