Physical and Chemical Changes Review

Which is an example of a different substance being formed?

• glass breaking

• metal melting

• water freezing

• wood burning

Tags

NGSS.MS-PS1-2

Examine the diagram.

What would a teacher most likely use this image to explain?

• Heat being added and taken away is causing physical changes in water.

• Air being added and taken away is causing physical changes in water.

• Heat being added and taken away is causing chemical changes in water.

• Air being added and taken away is causing chemical changes in water.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Jennifer left her bike outside, buried in snow. In the spring, when the snow melted, she found her bike covered in rust. Which best describes the change to the bike?

• It was a chemical change, because the bike was a different color.

• It was a chemical change, because the rubber tires were deflated.

• It was a chemical change, because rust can be removed from the metal.

• It was a chemical change, because rust is a new substance on the metal.

Tags

NGSS.MS-PS1-2

Gloria’s family built a wood fire in the fireplace. The next day, Gloria noticed that there was no wood left in the fireplace, only ashes. Which best explains this?

• Wood is separated from ashes as it burns.

• Wood becomes a new substance as it burns.

• Ashes have the same properties as wood.

• Ashes are the same substance as wood.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Which is the best example of a physical change?

• ice melting

• paper burning

• fireworks exploding

• leaves changing color

Tags

NGSS.MS-PS1-4

Which best describes a chemical change in paper?

• folding paper

• mailing paper

• burning paper

• cutting paper in half

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Water is boiled and water vapor forms. Which best describes this process?

• A chemical change occurs because a completely new substance forms.

• A chemical change occurs because the temperature of the water changes.

• A physical change occurs because the water disappears as it is absorbed by air.

• A physical change occurs because water and vapor are different states of the same substance.

Tonya observes a mixture of two clear liquids in a container to see if a chemical change occurs. Which observation demonstrates the mixture is undergoing a chemical change?

• The mixture remains at a constant temperature.

• A gas forms after the liquids are mixed.

• One liquid floats on top of the other.

• The mixture does not change color.

Tags

NGSS.MS-PS1-2

Which best describes what happens when water condenses on a glass?

• A physical change occurs, because the water changes form.

• A physical change occurs, because the water changes color.

• A chemical change occurs, because the water gives off light.

• A chemical change occurs, because the water forms a new substance.

Tags

NGSS.MS-PS1-4

Ruth left a wax candle in her car for several hours on a warm day. Which  describes the change in the candle Ruth most likely observed?

• The candle changed its shape.

• The mass of the candle wax increased.

• The mass of the candle wax decreased.

• The candle changed into a new substance.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4