Physical And Chemical Changes- TEST REVIEW Question Preview (ID: 41487)


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Students heat a white solid in a test tube over a flame. What observation would tell the students that the solid has become a new substance?
a) The temperature of the solid increases.
b) The solid begins to melt within the test tube.
c) The color of the solid changes to amber.
d) The solid is in the form of crystals.

The particles in a substance move differently in different states of matter. Which of the options below shows the states of matter, in order, from the one in which particles move the least, to the one in which particles move the most?
a) Solid . .Gas... Liquid
b) Gas...Solid... Liquid
c) Solid...Liquid...Gas
d) Liquid...Gas....Solid

When ice melts and becomes a liquid, this is a physical change. We know this because
a) the change requires extreme heat.
b) the change can't be reversed.
c) the change produces no new substance.
d) the change takes a long time.

Ice cubes are placed on a table in a warm room. What happens to the ice particles?
a) The particles change shape.
b) The particles move faster.
c) The particles change color.
d) The particles become larger.

What causes water to turn into a solid when placed in a freezer?
a) The freezer takes heat from the water.
b) The freezer keeps the water in darkness.
c) The freezer adds more weight to the water.
d) The freezer needs electricity to work.

A mixture of sand and gravel can be separated by putting it in a container with holes that only the sand can pass through. This method works to separate the mixture because sand and gravel differ in which physical property?
a) state
b) color
c) weight
d) size

In which of the following examples is a mixture separated by using physical properties?
a) Using a filter to get the sand out of puddle water
b) Stirring water and salt to make salt water
c) Making coffee by using heated water
d) Freezing juice to make flavored ice

In which of the following actions does a physical change occur to separate a mixture?
a) Adding sand to a beaker of water
b) Evaporating water from salt water
c) Freezing a solution of water and sugar
d) Stirring chocolate syrup into milk

The chemical properties of paper are changed when which of the following is done to it?
a) burning
b) cutting
c) folding
d) tearing

Which of the following describes using a physical change to separate a mixture?
a) Burning wood to produce thermal energy to cook food
b) Adding vinegar to baking soda to produce bubbles from a gas
c) Heating water to be able to dissolve more sugar in it
d) Melting a chocolate bar with almonds to remove the almonds

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