What is a chemical change?

• A change in the state of a substance

• A change that forms new substances with different properties

• A reversible change

• A change that does not involve breaking bonds

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Analyzing

Which of the following is NOT a sign of a chemical change?

• Color change

• Gas production

• Melting of ice

• Precipitate formation

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Analyzing

When iron reacts with oxygen to form rust, what type of change is occurring?

• Physical change

• Chemical change

• State change

• Reversible change

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Analyzing

The Maillard reaction, which gives cooked food its distinct flavor and texture, is an example of a ______ change.

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Analyzing

Photosynthesis is a process where plants convert sunlight, water, and carbon dioxide into glucose and ______.

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Analyzing

In the reaction between baking soda and vinegar, what gas is produced?

• Oxygen

• Hydrogen

• Carbon dioxide

• Nitrogen

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Analyzing

The souring of milk due to bacterial activity is a sign of a ______ change.

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Analyzing

What is a chemical change?

• A process where a substance changes its state without forming a new substance

• A process where one or more new substances with different properties are formed

• A process where the shape of a substance changes without altering its chemical composition

•  A process that only involves a change in temperature

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is NOT a sign of a chemical change?

• Color change

• Change in size

• Gas production

• Precipitate formation

Tags

NGSS.MS-PS1-2

What is typically happening at the molecular level during a chemical change?

• Atoms are being destroyed

• New atoms are being created

• Bonds between atoms are breaking and new ones are forming

• Atoms are staying in place, but their shape is changing

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5