Exploring Physical and Chemical Changes

The video tutorial explains the differences between physical and chemical changes. Physical changes involve changes in state or form where the substance retains its identity, such as water changing states or breaking a pencil. Chemical changes result in the formation of new substances, indicated by signs like heat, light, or gas production, such as rusting metal or burning wood. Examples of both types of changes are provided to illustrate these concepts.

What remains unchanged in a physical change?

• Neither

• Both

• Physical appearance

• Chemical composition

What does not change its identity in a physical change?

• Pencil

• Water

• Aluminum can

• All of the above

What is an example of a physical change?

• Burning wood

• Water freezing

• Metal rusting

• Baking bread

Which process involves a physical change?

• Digesting food

• Cooking food

• Burning paper

• Cutting paper

Which is a sign of a chemical change?

• Change in shape

• Change in size

• Production of heat

• All of the above

Tags

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What indicates a chemical change might have occurred?

• Change in texture

• Production of sound

• Change in shape

• Change in color

Tags

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What happens when baking soda reacts with vinegar?

• It evaporates

• It produces gas

• It freezes

• It dissolves

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What new substance is formed by mixing baking soda and vinegar?

• Water

• Carbon dioxide

• Salt

• Hydrogen peroxide

Tags

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What is left after wood is burned?

• Wood

• Carbon dioxide

• Water

• Ashes

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is a result of a chemical change in fireworks?

• Temperature decrease

• Color preservation

• Physical deformation

• Light and sound

Tags

NGSS.MS-PS1-2

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