Quiz: Changes in Matter

Amanda wants to make a cake. She measures sugar, eggs, oil, flour, and flavorings and mixes them together with a whisk. She pours the ingredients into a pan and bakes them. When the cake is baked, she frosts it. Which part of making a cake involves a chemical change?

Groups:

(a) Physical Change

,

(b) Chemical Change

• Pours ingredients into a pan

• Baking the cake

• Frosting the cake

• Mixing ingredients together with a whisk

Which of the following best explains what happens when a popsicle melts?

• It is a physical change because a new substance was made.

• It is a physical change because it can be easily reversed.

• It is a chemical change because the properties of the popsicle changed.

• It was a chemical change because it cannot be easily reversed.

Match the description with the correct term.

• Example of a Physical Change

• A physical change includes changing state or form and can be reversed. Change in appearance

• Physical Change

• A new substance is formed and it cannot be reversed.

• Chemical Change

• Melting ice

When you make a pitcher of fruit punch from a powdered packet of drink mix, the water changes color. Is this a physical or chemical change?

• It is a physical change because no new substance is formed.

• It is a chemical change because a new substance is created.

• It is a chemical change because the powder dissolves in water.

• It is a physical change because the powder reacts with water.

Which of the following lists four pieces of evidence that indicate a chemical change has occurred?

• Color change, gas production, temperature change, formation of a precipitate

• Color change, melting, dissolving, boiling

• Gas production, freezing, condensation, sublimation

• Temperature change, evaporation, condensation, melting

Read each of the statements describing a change. Categorize these examples as physical or chemical changes.

Groups:

(a) Physical Change

,

(b) Chemical Change

• Burning firewood in a campfire

• Cutting a piece of paper into smaller pieces

• Using a magnet to remove iron shavings from a mixture of sand and iron

• Lighting fireworks and then seeing the colors and hearing the sound pops as they go off

When baking soda is mixed with vinegar, a gas is produced. What type of change is this?

• It is a physical change because the mixture can be reversed.

• It is a chemical change because a new substance is formed.

• It is a physical change because the substances can be separated.

• It is a chemical change because it involves a temperature change.

Which of the following indicates that a physical change has occurred?

• Color change, gas production, temperature change, light emission

• Evaporation, condensation, melting, freezing

• Change in state, dissolving, mixing, breaking

• Formation of bubbles, color change, temperature change, solid formation