Structures and Properties of Matter

Sam had a piece of chalk that had a mass of 3 grams. He smashed it with a hammer
into smaller pieces. He gathered all the pieces up and used a balance to measure the mass of  the chalk.
The mass of the chalk ___________.

• increased
• decreased
• stayed the same

Which statement best explains why fruit salad is classified as a mixture?

• The components can be easily separated.
• When heated, a new substance is formed.
• The ingredients will combine to make new matter.
• The physical properties of the components change.

On a warm, sunny afternoon, ocean water splashed onto a rock. A short time later, the
rock was dry. Which statement best explains what happened to the water on the rock?

• Salt caused the water to become a gas.
• Heat caused the water to become a gas.
• Salt melted the water and it disappeared.
• Heat melted the water and it disappeared.

Taylor put iron filings and sand in a jar. She put a lid on the jar and shook it until the two
materials combined, but the materials did not bond together. What did Taylor make?

• mixture
• solution
• gas
• molecule

A balance is used to measure ______.

• mass
• volume
• density
• weight

A glass of iced tea is placed on a table. After 10 minutes, there are drops of water on
the outside surface of the glass. Which change in phase caused the drops of water?

• Liquid water in the air evaporated into a gas.
• Liquid water in the air condensed into a solid.
• Water vapor from the air evaporated into a liquid.
• Water vapor from the air condensed into a liquid.

Which of the following mixtures would a screen be used to separate the different
particles?

• salt and sugar
• water and sand
• sand and rocks
• iron filings and sand

When water changes from solid to liquid to gas, which statement is true?

• The mass increases.
• The mass stays the same.
• The mass decreases.

When Jake breathes out on a cold day, a cloud is formed. Which change occurs that
lets Jake see his breath as a cloud?

• liquid changes to solid
• solid changes to a gas
• liquid changes to a gas
• gas changes to a liquid

What two physical properties could best describe a basketball?

• color and texture
• weight and solubility
• size and magnetism
• magnetism and hardness