JDES Physical and Chemical 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 ice or dissolving sugar in water.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning wood or rusting metal.

Front

What happens during a chemical reaction?

Back

During a chemical reaction, substances (reactants) undergo a transformation to form new substances (products), often involving energy changes.

Front

What is an example of a physical change?

Back

An example of a physical change is ice melting into water.

Front

What is an example of a chemical change?

Back

An example of a chemical change is the rusting of iron.

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

Back

A physical change does not change the chemical composition of a substance, while a chemical change results in new substances being formed.

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What happens to water when it is heated?

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When water is heated, it can boil and turn into steam (gas), which is a physical change.

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What is an example of a process that is NOT a chemical change?

Back

Folding paper is an example of a process that is NOT a chemical change.

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How can mixtures be separated?

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Mixtures can be separated by physical methods such as filtration, evaporation, or adding water.

Front

What is evaporation?

Back

Evaporation is the process by which liquid turns into vapor (gas) at temperatures below its boiling point.