Physical and Chemical Changes Quiz

Leaves decomposing in a forest is an example of what kind of change?

• Physical

• Chemical

• Both

• Neither

Which of Camila’s observations provides evidence that a chemical change is taking place?

• The wick of the candle is giving off light as it burns.

• The wax is running down the side of the candle.

• The wax is changing from a solid to a liquid.

• The candle is getting shorter.

What type of change occurs with the ice melting?

• chemical because a liquid formed

• chemical because heat caused the change

• physical because it happened over time

• physical because no new substance was formed

Which statement describes a chemical change?

• Sugar dissolving in tea.

• The sun warms the surface of a road.

• Scissors are used to cut paper into small pieces.

• Acid produced in your stomach breaks down food you eat.

Which choice BEST represents a change that can be turned back into its original form?

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Which statement BEST describes what happened to the metal on the bicycle when left outdoors?

• The metal was damaged by insects.

• The metal became covered with pollution.

• The metal was used over time and became worn-out.

• The metal reacted with water and formed a new substance.

In a dish, Landon dissolved 15g of salt into 100ml of water and left it outside for a few days in the hot sun. What did Landon find in the dish after a few days?

• Only a colored solution would be found in the dish.

• Landon would find dry salt crystals in the dish.

• Landon would not find anything in the dish.

• Only water would be found in the dish.

Brittney added a little baking soda to a balloon and than poured it into a water bottle filled with vinegar. Bubbles started coming from the mixture as gas was released and inflated the balloon. Which statement BEST describes why gas was produced?

• A chemical reaction took place.

• The mixture was starting to boil.

• The air in the water bottle contracted.

• The vinegar and baking soda expanded.

Which is a physical change?

• Rusting iron

• Burning paper

• Cracking an egg shell

• Reacting baking soda and vinegar

Madeline puts a stick of butter in a pan on the stove. She turns the stove on and watches the butter melt. However, the heat on the stove is too high, so the edges of the melted butter scorches and burns. Which statements describe the changes Madeline observed in the butter?

• Both the melting and the burning of the butter were chemical changes.

• Both the melting and the burning of the butter were physical changes.

• The melting butter was a physical change while the burning butter was a chemical change.

• The melting butter was a chemical change while the burning butter was a physical change.