Physical and Chemical Changes Lab Flashcard ACA

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.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances with different properties.

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change.

Front

Give an example of a chemical change.

Back

Baking soda reacting with vinegar to produce carbon dioxide gas is an example of a chemical change.

Front

What evidence indicates a chemical change has occurred?

Back

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

Front

What happens to the molecules during a physical change?

Back

During a physical change, the arrangement of molecules may change, but their chemical structure remains the same.

Front

What happens to the molecules during a chemical change?

Back

During a chemical change, the bonds between atoms are broken and new bonds are formed, resulting in new substances.

Front

Is breaking a vase a chemical change?

Back

No, breaking a vase is a physical change because it only changes the shape of the vase.

Front

What is an example of a change in state of matter?

Back

Melting ice to water is an example of a change in state of matter.

Front

What is the role of temperature in chemical changes?

Back

Temperature can affect the rate of a chemical change; some reactions may require heat to occur.