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A sample of water will be heated from 85°C to 105°C. Which phrase best describes what the water particles will do?

• speed up, move closer together, and melt

• slow down, move closer together, and melt

• speed up, move farther apart, and evaporate

• slow down, move farther apart, and evaporate

Water can change state. What happens to water during condensation?

• It changes from liquid to a gas.

• It changes from a gas to a liquid.

• It changes from a liquid to a solid.

• It changes from a solid to a liquid.

Mrs. Jones wants to prove to her students that when an object is burned, its total mass is the same before and after the reaction. What should Mrs. Jones do to make sure this is shown by the experiment?

• burn the object in a closed container

• burn the object outside on a nice day

• add water to the object after it is burned

• split the object into two equal pieces before burning

A container of water is heated to 100°C. At this temperature, what will happen to the water?

• It will boil, and the molecules will move more quickly.

• It will melt, and the molecules will move more slowly.

• It will freeze, and the molecules will move more slowly.

• It will condense, and the molecules will move more quickly.

According to the particle theory of matter, there is space between the small particles that make up matter. The space between particles differs depending on the state of the matter. Which list ranks the states of matter, according to the spacing between particles, from largest to smallest?

• solid, liquid, gas

• gas, solid, liquid

• liquid, gas, solid

• gas, liquid, solid

The amount of matter in an object is 

• pressure

• weight

• mass

• force

A helium balloon is taken outside on a very cold day. The balloon wrinkles and becomes a little smaller, but returns to its normal size when it is taken back inside the warm house. Why does the balloon inflate when it reenters the warm house?

• The warmer temperature causes the gas in the balloon to expand.

• The warmer temperature causes the gas in the balloon to contract.

• The warmer temperature causes the gas in the balloon to turn into a solid.

• The warmer temperature causes more gas to enter the balloon, and it expands.

A scientist heats a sample of liquid water. How will the heating affect the water particles?

• The particles will move slower.

• The particles will move faster.

• The particles will gain mass.

• The particles will lose mass.

Dixon wants to measure how much mass her science book has.  Which tool does she need to use?

• a balance scale

• a graduated cylinder

• a ruler

• a chronometer

A student flattens a ball of clay he is given and shapes it to resemble a

boat. Which best describes the masses of the clay ball and the clay

boat?

• The mass of the clay ball is more than the mass of the clay boat.

• The mass of the clay boat is more than the mass of the clay ball.

• The masses of the clay ball and the clay boat are the same.

• The clay ball has mass, but the clay boat does not.