Flight Unit Test Review

What is the primary purpose of a parachute?

• To increase the speed of descent

• To slow down an object that is falling towards the ground

• To help an object fly

• To reduce air resistance

What force does a parachute counteract when it is used during skydiving?

• Air resistance

• Wind resistance

• Gravity

• Momentum

What is similar between water and air?

• Both are solid substances

• Both have no resistance

• Both are fluids and the same principles apply to moving through them

• Both allow for faster movement when resistance is increased

Opening your parachute decreases the air resistance when skydiving.

• True

• False

We can position our bodies like a starfish to increase air resistance.

• True

• False

Increasing air resistance while falling will slow our fall down.

• True

• False

What does increasing the surface area of a parachute do to the fall of an object?

• Decreases air resistance

• Increases air resistance and slows down the fall

• Has no effect on the fall

• Makes the object fall at the same speed as without a parachute

What is the purpose of the cords attached to a parachute?

• To change the direction of the parachute

• To make the parachute look more colorful

• To attach the parachute to the airplane

• To open the parachute

What principle allows hot air balloons to float in the air?

• The air inside the balloon is cooler than the air outside

• The air inside the balloon is the same temperature as the air outside

• The air inside the balloon is heated to be lighter than the air outside

• The air inside the balloon is compressed to be lighter than the air outside

What happens when the pilot of a hot air balloon wants to descend?

• The pilot heats the air more

• The pilot allows the air to cool down

• The pilot pumps in more hot air

• The pilot releases helium from the balloon