Chem/Phys Change Together

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 chemical composition of the substance. Examples include burning, rusting, and cooking.

Front

Is melting chocolate a physical or chemical change?

Back

Melting chocolate is a physical change because it changes the state of the chocolate from solid to liquid without changing its chemical composition.

Front

Is fireworks exploding a physical or chemical change?

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Fireworks exploding is a chemical change because it involves a chemical reaction that produces new substances, such as gases and light.

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What happens during a chemical change?

Back

During a chemical change, the bonds between atoms are broken and new bonds are formed, resulting in the creation of new substances.

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What are some indicators of a chemical change?

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

Front

Is burning wood a physical or chemical change?

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Burning wood is a chemical change because it transforms the wood into ash, smoke, and gases through combustion.

Front

Is dissolving sugar in water a physical or chemical change?

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Dissolving sugar in water is a physical change because the sugar can be recovered by evaporating the water, and its chemical composition remains unchanged.

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?

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An example of a chemical change is iron rusting when exposed to moisture and oxygen.