True/False
Indicate whether the sentence or statement is true
or false.
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| 1. | The
ONLY reason we add water to cover the bottom of the aluminum can is to keep it from
melting.
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| 2. | When
the can is turned upside down into the water trough the can collapses because of
suction.
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| 3. | Boiling water in the can fills the can with water vapor and pushes air out of the
can.
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| 4. | Turning the can upside down and plunging it into the water cools the can and the water
vapor inside. This causes the water vapor (a gas) to condense back into liquid water taking up much
less space. This dramatically reduces pressure inside the can.
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| 5. | A
given volume of water when evaporated takes up 4600 times as much space as the original volume of
water
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| 6. | This
can crusher lab would work just as well if no water was placed in the bottom of the aluminum
can.
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| 7. | When
cooled, gases contract in volume.
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| 8. | When
heated, gases contract in volume.
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| 9. | A can
is crushed when the pressure inside the can is greater than the pressure outside the
can.
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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| 10. | A
fully inflated basketball taken outside on a cold day will seem less “bouncy”
because... a. | it gets stiff
outside in the cold. | c. | the cold ground
is not as resilient as the indoor floor. | b. | there is less moisture in colder
air. | d. | the colder
temperature decreases pressure inside the ball. | | | | |
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| 11. | When
the can is turned upside down and plunged into the water trough it collapses because a. | the sides of the
can get sucked in. | c. | the rapid
temperature change weakens the walls of the can. | b. | air outside the
can pushes the sides in. | d. | density is
greater inside the can. | | | | |
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| 12. | In
this lab water is placed in the bottom of the aluminum can to a. | to cool the
can. | c. | create water
vapor which expands 1517 times in volume over liquid water. | b. | moderate the
temperature inside the can. | d. | keep the can
from melting. | | | | |
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| 13. | The
aluminum can is turned upside down into a water trough because a. | it plugs the
hole and cools the gases inside quickly. | c. | it’s needed to keep the high pressure sealed inside the
can. | b. | it keeps the can
from melting. | d. | outside air will
enter the can. | | | | |
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| 14. | Besides being able to boil the water, the amount of heat used underneath the
can a. | matters | c. | should not be
too hot | b. | does not matter | d. | should not be too cool | | | | |
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Matching
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 Choose the correct letter.
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| 15. | Low
pressure
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| 16. | High
pressure
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| 17. | Water
trough container
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| 18. | Water
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| 19. | High
density gas
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| 20. | Low
density gas
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 Choose the correct letter.
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| 21. | Aluminum can -- normal pressure
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| 22. | Air
in classroom -- normal pressure
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| 23. | Escaping air & water vapor
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| 24. | Evaporation
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| 25. | Boiling water
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