Properties of Matter Review

Janice found two sea shells when she went to the beach. They appear to be almost the same size, but they have different shapes. How could she figure out if their volume is the same?

• Weigh each one on a scale to see which is heaviest.

• Fill each one with water to see which will hold the most.

• Drop each one in a beaker of water to see which raises the water level the most.

• Measure the length of each one with a measuring tape to see which is longest.

The two objects shown are the same size. However, one object is made of wood, and the other object is made of plastic. Which of the following properties of the objects will be the same?

• mass

• texture

• volume

• weight

Susan blew up a balloon until it was completely full and as big as a soccer ball. Which of the following correctly describes the air inside the balloon?

• The air is a gas that cannot be compressed by any means.

• The air is a gas that always forms a round shape when compressed

• The air is a gas that expands to evenly fill the space inside the balloon.

• The air is a gas that will flow evenly and steadily from inside the balloon if punctured.

Dan brought some chocolate chips in a plastic container with his lunch one day. He decided to save them and eat them while he waited for the bus after school. All afternoon his lunch bag sat on the warm windowsill in his classroom. When he finally took the container out after school, the chocolate chips had turned into a hard chunk of chocolate shaped like the bottom of the container. What happened to his chocolate chips?

• They started as a solid, melted, and then became solid again

• They changed from a solid to a gas before becoming solid once again.

• They were a cool solid to start, then became a warm solid before cooling again.

• They went from being a hard solid to a gas, a liquid, and then to a hard solid again.

If two objects balance like the ones shown below, what must be true?

• Object A has more mass than object B.

• Both objects have the same mass.

• Object A has more volume than object B.

• Both objects have the same volume.

Imagine you have a bucket of saltwater. Which of the following would be the best way to remove the water so that you're left with only salt?

• Stir the saltwater for a long time. The salt will form a crystal.

• Leave the saltwater to sit for a long time. The salt will settle to the bottom.

• Boil the saltwater. The water will evaporate and only the salt will remain.

• Freeze the saltwater. The water will sink to the bottom and the salt will rise to the top.

Abdul uses sugar cubes to sweeten his tea. He wonders whether stirring his tea will make the sugar cube dissolve faster or slower. If Abdul stirs his tea, what effect does it have on the rate at which the sugar cube dissolves?

• The rate that the sugar cube dissolves will speed up.

• The rate that the sugar cube dissolves will slow down.

• The rate that the sugar cube dissolves will remain the same.

• The rate that the sugar cube dissolves will slow down and then stop.

Imagine a thick ten-kilogram block of soap and a thin ten-kilogram sheet of soap. Which answer correctly explains which will dissolve first when they are both placed underwater?

• The sheet will dissolve first because it has more surface area.

• The sheet will dissolve first because it has less mass than the block.

• The block will dissolve first because it is less spread out than the sheet.

• The sheet and the block weigh the same, so they will take the same amount of time to dissolve.

Sam drops a sugar cube weighing one gram in a cup of cold water and lets it sit until the sugar cube dissolves. Malcolm adds one gram of powdered sugar to a cup of hot water and stirs it with a spoon. Rosa adds a one-gram packet of sugar granules to a cup of cold water and stirs it with a spoon. Angela adds a sugar crystal weighing one gram to a cup of hot water and does not stir it.

Whose sugar is most likely to dissolve the fastest, and whose is slowest?

• Malcolm's sugar dissolves fastest, and Sam's dissolves slowest.

• Rosa's sugar dissolves fastest, and Malcolm's dissolves slowest.

• Sam's sugar dissolves fastest, and Angela's dissolves slowest.

• Angela's sugar dissolves fastest, and Rosa's dissolves slowest.

Jakob studied drawings of the particles in the same substance. The drawings show the substance in different states and temperatures. Which drawing most likely shows the substance at the highest temperature?

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