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10
×
What type of heat occurs where the candle flame touches the stick?
Conduction
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15
×
Why does the liquid in this bottle separate into layers?
The liquids are different densities. The liquid with the most density is on the bottom. The liquid with the least density is on the top.
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15
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What is density?
The amount of mass in a given space or volume
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15
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What happens to a substance when you cool it down?
It contracts because the molecules move slower and come closer together.
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15
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What makes a substance an insulator?
It does not conduct (transfer) energy easily. It keeps hot matter hot or cool matter cool.
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5
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Which layer in this bottle has the least density?
The top layer
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trap
No points!
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magnet
Take 5 points!
Okay!
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fairy
Take points!
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25
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lifesaver
Give 15 points!
Oops!
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seesaw
Swap points!
Oops!
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seesaw
Swap points!
Okay!
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fairy
Take points!
5
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25
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lifesaver
Give 10 points!
Oops!
15
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What makes a substance a conductor?
It conducts (transfers) energy easily. It quickly looses its heat or cold.
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5
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Give three examples of conductors
Teacher check- metal, metal spoon, flag pole
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10
×
How is the heat transferring in this image?
The heat is transferring from the warmer water to the colder ice.
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baam
Lose 20 points!
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gold
Win 50 points!
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gift
Win 15 points!
Okay!
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thief
Give points!
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10
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Why is the food coloring not mixing very much in the cold water glass?
In the cold water the molecules are moving slower so the food coloring mixes slowly.
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15
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What happens to the molecules in a substance when they are cooled?
The molecules move slower and come closer together. The substance will contract.
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10
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Why is the food coloring fully mixed in the hot glass?
In the hot water the molecules are moving faster so the food coloring mixes more quickly.
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10
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What type of heat transfer is this image showing?
Convection
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