Marvels of Matter

What is a chemical change?

• A change where the substance changes its state but not its chemical properties.

• A change where a new substance is formed.

• A change that can be easily reversed by changing the temperature.

• A change where no new substances are formed.

Which of the following is an example of a physical change?

• Burning wood

• Dissolving salt in water

• Rusting of iron

• Baking a cake

What property of matter is measured in grams using a pan balance?

• Volume

• Density

• Mass

• Temperature

Which state of matter has a definite volume but no definite shape?

• Solid

• Liquid

• Gas

• Plasma

What is a mixture?

• A pure substance made of only one kind of atom.

• A chemical combination of two or more substances.

• A physical blend of two or more substances, each of which keeps its own physical properties.

• A solution that cannot be separated into its components.

Which of the following is NOT a physical property of matter?

• Color

• Shape

• Energy

• Mass

What happens to the particles of a substance when it changes from a solid to a liquid?

• The particles move farther apart and move more freely.

• The particles come closer together and vibrate in fixed positions.

• The particles disappear and are replaced by new particles.

• The particles stop moving completely.

Which of the following is a characteristic of a solution?

• It has visibly different parts.

• It is always a solid.

• It cannot be separated easily.

• It cannot be made with liquids.

What is the process called when a liquid changes into a gas?

• Freezing

• Condensation

• Evaporation

• Sublimation

Which of the following is an example of a solution?

• Sand and pebbles mixed together

• Oil and water mixed together

• Saltwater

• A bowl of cereal with milk