Physical and Chemical Changes Test Review!

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and changes the composition of the substance. Examples include burning, rusting, and cooking.

Front

What happens to a bike when it rusts?

Back

When a bike rusts, it undergoes a chemical change due to the reaction of iron with oxygen and moisture, forming iron oxide (rust).

Front

What occurs when plants and animals die in an ecosystem?

Back

When plants and animals die, their bodies undergo a chemical change, breaking down into new materials that are recycled back into the ecosystem.

Front

What should you do after observing changes in an experiment?

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You should record your observations in your science notebook to keep track of the results and findings.

Front

What is an example of a chemical change in cooking?

Back

Frying chicken wings is an example of a chemical change because it involves cooking the meat, which alters its chemical structure.

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture, leading to the formation of rust.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not change the substance's chemical identity, while a chemical change results in the formation of new substances.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice into water, where the substance remains H2O.

Front

What happens during the burning of a candle?

Back

Burning a candle is a chemical change because it produces heat and light, and transforms the wax into carbon dioxide and water.