Differentiating Physical and Chemical Changes

The video tutorial explains the differences between chemical and physical changes. Chemical changes result in new substances through reactions, while physical changes alter the form but not the composition. Examples and signs of each type of change are provided, followed by a quiz to test understanding. The video concludes by revisiting the initial question about whipping egg whites, confirming it as a physical change.

What is a chemical change?

• A change that does not involve a chemical reaction

• A change that involves only physical properties

• A change that alters the shape of a substance

• A change that produces a new substance

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Which of the following is an example of a chemical change?

• Melting an ice cube

• Boiling water

• Explosions like fireworks

• Crumbling a piece of paper

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

What remains the same in a physical change?

• The color

• The temperature

• The physical appearance

• The chemical composition

Which of the following is a sign of a chemical change?

• Change in shape

• Change in phase

• Change in size

• Gas production

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NGSS.MS-PS1-2

What is the only way to be completely certain whether a change is physical or chemical?

• Performing a chemical analysis

• Measuring the temperature

• Observing the color change

• Checking for gas production

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NGSS.MS-PS1-2

Combining milk and cereal is an example of which type of change?

• Neither chemical nor physical change

• Physical change

• Chemical change

• Both chemical and physical change

What type of change occurs when you eat cereal?

• Physical change

• Chemical change

• No change

• Both physical and chemical change

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NGSS.MS-PS1-2

Why is mixing Coke and Mentos considered a physical change?

• Because no gas is produced

• Because the CO2 gas was already present in the Coke

• Because it involves a chemical reaction

• Because it changes the color of the Coke

Tags

NGSS.MS-PS1-2

What type of change is grilling meat?

• Both physical and chemical change

• No change

• Physical change

• Chemical change

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NGSS.MS-PS1-2

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NGSS.MS-PS1-5

NGSS.MS-PS3-4

What type of change is whipping egg whites?

• Both chemical and physical change

• Chemical change

• Physical change

• Neither chemical nor physical change