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15
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Explain the difference between hydraulic and pneumatic systems.
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10
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Which has greater buoyancy - salt or fresh water?
Salt water (more dense)
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10
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Plunger A has an area of 10cm^2, and Plunger B has an area of 50cm^2. How much more force can be exerted by Plunger B?
5 times
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15
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Water has a special property to do with density and temperature. What is it?
Water gets LESS dense when it becomes a solid (because its particles form crystals which have more space in between)
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10
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Adhesion is...
the force of attraction between particles of a fluid and particles of other substances
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15
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Draw diagrams related to particle theory to explain one of the following concepts: compressability, density, temperature/viscosity, temperature/volume
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10
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Two objects have the same mass, but different density. What can you say about their volume?
The more dense object will have a smaller volume.
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seesaw
Swap points!
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shark
Other team loses 25 points!
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gift
Win 20 points!
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thief
Give points!
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25
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boom
Lose 50 points!
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fairy
Take points!
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25
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shark
Other team loses 10 points!
Okay!
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lifesaver
Give 25 points!
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15
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Which will float better - an object which displaces 10kg of water, or an object which displaces 50kg of water? Both have the same mass.
50kg - more displacement, better floatation.
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5
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Name 5 fluids
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5
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The lower the viscosity of a liquid, the slower the flow rate. T/F?
F
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baam
Lose 20 points!
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gift
Win 25 points!
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fairy
Take points!
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25
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baam
Lose 20 points!
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15
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Why is buoyancy good for oil spills?
Oil is more buoyant than water, so the oil sits at the top of water. It's easier to clean it up.
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seesaw
Swap points!
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magnet
Take 25 points!
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rocket
Go to first place!
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thief
Give points!
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25
10
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How would you use displacement to measure the volume of an object?
Put it in water and see how much the water rises. Or, put it ina completely full container and measure how much liquid spills out.Â
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