Physical and Chemical Changes Review

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 tearing paper.

Front

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.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What happens when baking soda is mixed with vinegar?

Back

When baking soda is mixed with vinegar, a chemical reaction occurs that produces carbon dioxide gas, which creates bubbles and can inflate a balloon.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is an example of a chemical change in food?

Back

An example of a chemical change in food is when bananas ripen and change color due to the breakdown of chlorophyll.

Tags

NGSS.MS-PS1-2

Front

What evidence indicates a chemical change has occurred?

Back

Evidence of a chemical change includes color change, gas production, temperature change, and the formation of a precipitate.

Tags

NGSS.MS-PS1-2

Front

What is the role of heat in chemical changes?

Back

Heat can provide the energy needed to break bonds in reactants, allowing a chemical change to occur, such as cooking food.

Front

What is an example of a physical change?

Back

An example of a physical change is freezing water to make ice; the water changes state but remains H2O.

Tags

NGSS.MS-PS1-4

Front

How can you tell if a chemical change has occurred?

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You can tell if a chemical change has occurred by observing changes such as color change, gas formation, or the production of heat.

Tags

NGSS.MS-PS1-2

Front

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

Back

A physical change does not change the substance's chemical identity, while a chemical change results in new substances being formed.

Tags

NGSS.MS-PS1-2

Front

What happens to the particles in a substance during a physical change?

Back

During a physical change, the arrangement of particles may change, but the particles themselves remain the same.

Tags

NGSS.MS-PS1-4