Question of the Day
Question: Describe gases. How do they behave
differently from solids or liquids? Examples?
Answer: … … …
What Is Air
Made Of?
p. 52 CYU 2, 4, 5, 6
2.
State the law of conservation of mass and the law of conservation of
energy.
2. The law of conservation of mass states that mass cannot be created or
destroyed. The law of conservation of energy states that energy cannot be
created or destroyed.
p. 52 CYU 2, 4, 5, 6
4. Rank the following in order of increasing strength of forces between
molecules:
a. honey
b. marble c. water
d. candle wax e. nitrogen gas
4. The correct order from strongest to weakest forces between molecules is
nitrogen gas, water, honey, candle wax, and marble. (e, c, a, d, b)
Gas:
Liquid:
Solid:
p. 52 CYU 2, 4, 5, 6
5. Compare and contrast the shape and volume of solids, liquids, and gases.
5. Solids have a definite volume and a definite shape. Liquids have a
definite volume but no definite shape. Gases have neither a definite
volume nor a definite shape.
6. Predict which two of the following involve the same energy transfer.
Assume that the same substance and the same mass is involved in all
four processes.
a. Melting
b. evaporation c. sublimation d. condensation
6. Evaporation and condensation are opposite processes that involve the
same amount of energy transfer.
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Investigating CO2

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