Unit Test — Unit test Answers

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During which change of state do atoms lose energy?

sublimation

freezing

boiling

melting

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Which is the amount of matter in an object?

weight

mass

volume

pounds

Four students made statements about a tennis ball they were using in a lab.Which student made a mistake in her statement?

Irma

Julia

Grace

Masha

Which describes a feature of the physical changes of all substances?

can dissolve in water

can conduct heat and electricity

rearranges atoms to form new substances

does not change the identity of a substance

A scientist is examining an unknown solid. Which procedure would most likely help determine a chemical property of the substance?

heating it to find the temperature at which it melts

exposing it to a flame to see if it catches on fire

hitting it with a hammer to determine if it breaks or bends

placing it in water to find out whether or not it dissolves

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