Piston engines turn a set of small wings called ___________ to produce thrust
A propeller!
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boom
Lose 50 points!
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fairy
Take points!
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25
gift
Win 25 points!
Okay!
baam
Lose 25 points!
Oops!
5
What kind of force do engines produce?
Thrust.
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20
What happens to air when you heat it up?
The air particles move faster, air expands, air becomes less dense, and air rises
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monster
Reset all scores!
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rocket
Go to first place!
Okay!
fairy
Take points!
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25
lifesaver
Give 15 points!
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15
Racing cyclists often bend their head down low. Why do they do this?
Bending their head down reduces the area of their body that is exposed to the air. This means less air resistance, and less drag.
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15
What is a vaccuum?
A space with nothing in it (no air)
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20
Which plane will experience less drag, and why?
Drag is caused by air resistance, or the rubbing (friction) of air against the surface of an object. The more air can pass over the object, the less drag!
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25
How do wings generate lift?
The airfoil shape of a wing pushes air down and causes a pressure difference between the bottom and top of the wing.
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boom
Lose 50 points!
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star
Double points!
Okay!
shark
Other team loses 5 points!
Okay!
thief
Give points!
5
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20
25
banana
Go to last place!
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fairy
Take points!
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10
15
20
25
fairy
Take points!
5
10
15
20
25
thief
Give points!
5
10
15
20
25
15
In order for a helicopter to hover in the air, all four forces of flight have to be ____________
Balanced / Equal
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10
What is an airfoil?
The common shape of a wing, that helps it generate lift.
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15
For thrust to be generated in an engine, there has to be more pressure in the backward direction than the forward direction. True or false?
False!
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15
What would happen if you blew cold air inside a hot air balloon while it was flying?