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    Physical Science Quiz
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Water is most ____ at 4° C (39° F), when it is a liquid. accelerate
Mass ____ acceleration equals force. dense
Heating a helium-containing balloon will cause it to ____. expand
A force (a push or a pull) can cause an object with mass to ____. floats
Ice ____ because its density is less than liquid water. graduated
A ____ cylinder is better than a beaker for measuring volumes. neutral
Fossil fuels and nuclear power are ____ energy resources. nonrenewable
At 25°C, pure water has a pH of 7 and therefore is ____. times

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