Physical and Chemical Changes

A chemical change is a change in

• an item's properties such as size, shape, density

• an item that creates a new substance, releases light or heat

• an item's sound

• an item's look or state of matter

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When zinc reacted with hydrochloric acid, what was the result of this reaction?

• a white powder

• a blue liquid

• a brown precipitate

• a gas

Tags

NGSS.MS-PS1-2

Which of Mark’s observations would show that a burning candle is a chemical reaction?

• Black smoke is given off; hot gases are rising.

• The wax starts to melt.

• The candle is white and made of wax and a wick.

• Time passes one minute at a time.

Tags

NGSS.MS-PS1-2

Which of Mark’s observations would show that a burning candle has physical changes?

• Black smoke is given off; hot gases are rising.

• The wax starts to melt.

• C. The flame glows red and orange.

• D. Time passes one minute at a time.

Tags

NGSS.MS-PS1-2

What evidence shows that ice has a physical change when left out in a room?

• It reacts with oxygen in the air.

• It changes to water

• It is hard and white.

• It is cold to the touch.

Tags

NGSS.MS-PS1-4

The characteristic of matter that can be observed or measured is known as ____________________________

• chemical property

• physical property

• reflectivity

• magnetism

Is this an example of physical or chemical change?

• physical change

• chemical change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Is this an example of physical or chemical change?

• physical change

• chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Is rust forming on a bike that has been left outside in the rain an example of physical or chemical change.

• Physical change

• Chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How are you able to determine the physical properties of a substance?

• By using the senses to smell, taste, hear, feel or see it.

• By comparing it to the substances that surround it

• by observing how it reacts with other substances.

• by observing its shape and reflectivity