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15
×
What will most solids do when they are heated?
melt/expand
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20
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How do you change a liquid to a solid?
Remove energy.
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15
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Fill in the Blank: A change of state is a _____________ change.
physical
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15
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True or False? Heating or cooling will cause the volume of a substance to change.
True
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20
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What happens to a gas when energy is removed from a gas?
It turns to a liquid/condenses.
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15
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True or False? Heating or cooling will cause the mass of a substance to change.
False
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20
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How is ice an exception to the thermal contraction/expansion rule?
When water freezes to ice the volume increases rather than decreases.
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20
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What's wrong? Matter is often conserved in a physical change?
Often should read always.
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20
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What causes thermal expansion?
adding heat/energy/increase in temperature/particles vibrating more rapidly
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25
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Why is dry ice an example of sublimation?
Because it changes from solid to a gas skipping the liquid state.
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thief
Give points!
5
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25
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shark
Other team loses 10 points!
Okay!
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rocket
Go to first place!
Okay!
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thief
Give points!
5
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25
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lifesaver
Give 25 points!
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seesaw
Swap points!
Okay!
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gift
Win 20 points!
Okay!
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thief
Give points!
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25
15
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What is a word that means changing from a solid to a liquid?
melting
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heart
Other team wins 25 points!
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gold
Win 50 points!
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fairy
Take points!
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25
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baam
Lose 10 points!
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15
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How have engineers avoided issues to bridges caused by thermal expansion and contraction?
expansion joints
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20
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What happens to a substance’s particles when energy is added?
They speed up.
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