Review Physical and CHemical Properties and Changes

Front

What is a chemical change?

Back

A chemical change is a change in which a substance transforms into a new substance, often involving the release of light or heat.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is an example of reactivity in chemistry?

Back

Fluorine gas spontaneously igniting a concrete block at room temperature is an example of reactivity.

Tags

NGSS.MS-PS1-2

Front

What is the best example of a new substance forming?

Back

Lighting a match is the best example of a new substance forming.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is condensation on a glass an example of?

Back

Condensation on a glass is an example of a physical change.

Tags

NGSS.MS-PS1-4

Front

What kind of change occurs if matter changes in amount, size, or shape?

Back

A physical change occurs if matter changes in amount, size, or shape.

Front

What are the main differences between physical and chemical changes?

Back

Physical changes do not alter the chemical composition of a substance, while chemical changes result in the formation of new substances.

Tags

NGSS.MS-PS1-4

Front

Can a physical change be reversed?

Back

Yes, many physical changes can be reversed, such as melting and freezing.

Front

What is an example of a physical change?

Back

An example of a physical change is the melting of ice into water.

Tags

NGSS.MS-PS1-4

Front

What is the significance of observing color change in a reaction?

Back

A color change can indicate a chemical change has occurred, suggesting the formation of a new substance.

Tags

NGSS.MS-PS1-2

Front

What is the role of energy in chemical changes?

Back

Energy is often absorbed or released during chemical changes, which can manifest as heat or light.

Tags

NGSS.MS-PS3-4