5th grade chemical and physical change

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 breaking a glass.

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What is a chemical change?

Back

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

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Is lighting a match a physical change?

Back

No, lighting a match is a chemical change because it produces new substances (like ash and gases) through combustion.

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What is flammability?

Back

Flammability is a chemical property that describes how easily a substance can catch fire and burn.

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What happens when milk sours?

Back

When milk sours, it undergoes a chemical change due to the action of bacteria that produce lactic acid.

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What is an example of a physical change?

Back

An example of a physical change is freezing water to make ice.

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What is an example of a chemical change?

Back

An example of a chemical change is baking a cake, where ingredients react to form a new product.

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

Back

A physical property can be observed without changing the substance's identity (like color or density), while a chemical property describes a substance's ability to undergo a chemical change.

Front

What happens to a banana that is rotting?

Back

A rotting banana undergoes a chemical change as it decomposes and produces new substances.

Front

What is thermal conductivity?

Back

Thermal conductivity is a physical property that measures how well a substance can conduct heat.