Chemical and Physical Changes

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 breaking.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves the rearrangement of atoms and can include processes like burning, rusting, and cooking.

Front

Give an example of a physical change.

Back

An example of a physical change is a glass falling and shattering on the floor.

Front

Give an example of a chemical change.

Back

An example of a chemical change is frying eggs.

Front

What happens to matter during a chemical change?

Back

During a chemical change, matter is transformed into one or more new substances with different properties.

Front

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

Back

A physical change affects only the appearance of a substance, while a chemical change results in the formation of new substances.

Front

What is an indicator of a chemical change?

Back

Indicators of a chemical change can include color change, temperature change, gas production, or the formation of a precipitate.

Front

What is an example of a change in state?

Back

An example of a change in state is water freezing into ice.

Front

What is meant by 'change in appearance only'?

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Change in appearance only refers to a physical change where the substance's form or look changes, but its chemical identity remains the same.

Front

What is an example of a chemical reaction?

Back

An example of a chemical reaction is the reaction between baking soda and vinegar.