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15
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If I put a water bottle with a balloon over it into a pot of boiling water, what happens to the balloon? Why?
The balloon will fill with air, because the hot water will heat the air in the bottle, causing it to expand and fill the balloon.
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5
×
Name one kind of engine
Piston engine, jet engine, rocket engine
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baam
Lose 15 points!
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gold
Win 50 points!
Okay!
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shark
Other team loses 25 points!
Okay!
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lifesaver
Give 20 points!
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5
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What kind of force do engines produce?
Thrust.
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20
×
Newton's third law says: If an object has a force going forward, there has to be an equal force going backward. What's a real life example of this?
...
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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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15
×
Where does gravity come from?
Gravity is a pulling force that comes from very large and heavy objects, like planets.
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eraser
Reset score!
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magnet
Take 25 points!
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shark
Other team loses 20 points!
Okay!
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baam
Lose 25 points!
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20
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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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5
×
Air can be compressed, true or false?
True
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eraser
Reset score!
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fairy
Take points!
5
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25
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gift
Win 20 points!
Okay!
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baam
Lose 15 points!
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heart
Other team wins 25 points!
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gift
Win 15 points!
Okay!
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fairy
Take points!
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25
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thief
Give points!
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25
10
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Engines produce thrust by making a ____________ difference.
Pressure
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15
×
What is air pressure?
the force of air on surrounding objects (higher pressure = more force)
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5
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A balloon with air inside of it is heavier than a balloon without air inside of it, true or false
true!
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10
×
What is an airfoil?
The common shape of a wing, that helps it generate lift.
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