5th Grade Physical and Chemical Changes

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include changes in shape, size, or state of matter.

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What is a chemical change?

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A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and changes the chemical properties of the original substance.

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What is a mixture?

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A mixture is a combination of two or more substances where each substance retains its own properties. Mixtures can often be separated by physical means.

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What is condensation?

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Condensation is the process by which water vapor in the air is changed into liquid water. It occurs when warm air cools and loses its ability to hold moisture.

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What happens during evaporation?

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Evaporation is the process by which liquid water changes into water vapor. It occurs when molecules at the surface of the liquid gain enough energy to escape into the air.

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

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A physical change does not change the chemical composition of a substance, while a chemical change results in the formation of new substances with different properties.

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What is an example of a physical change?

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An example of a physical change is ice melting into water. The ice changes state from solid to liquid, but it remains water.

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What is an example of a chemical change?

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An example of a chemical change is baking a cake. The ingredients undergo a chemical reaction to form a new substance: the cake.

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What is the process of melting?

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Melting is the process where a solid turns into a liquid when it is heated. For example, ice melts to become water.

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What is the process of freezing?

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Freezing is the process where a liquid turns into a solid when it is cooled. For example, water freezes to become ice.