Physical/Chemical Changes

A family goes camping and creates a to roast marshmallows. The next morning, the kids notice that the logs are no longer there, and all that remains are ashes. Which best explains why the ashes from a log are evidence of a chemical change?

• The color of the wood changed from brown to gray.
• The wood breaks down into smaller matter when burned.
• The ashes cannot be put back together to create a log again.
• Something was added to the log, and it cannot be removed.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which example best describes a physical change?

• iron rusting
• charcoal burning
• an ice cube melting
• a marshmallow burning

Water is boiled and turns to vapor. The vapor is cooled and changes back into water. Which best describes what has occurred?

• a physical change, because the matter changed its state
• a chemical change, because the matter changed its state
• a physical change, because a new substance was formed
• a chemical change, because a new substance was formed

Tags

NGSS.MS-PS1-4

Which is an example of a chemical change?

• baking a cake
• freezing water
• crushing a can
• breaking an egg

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is the best example of a physical change?

• ice melting
• paper burning
• fireworks exploding
• leaves changing color

Which best explains why burning wood is a chemical change?

• The process occurs quickly.
• The process can be reversed.
• The process can be repeated.
• The process creates a new substance.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is a chemical change?

• frying an egg
• boiling water
• breaking a glass cup
• crushing a piece of bread

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is an example of a chemical change?

• clouds forming
• sugar dissolving
• water freezing
• a candle burning

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Nick and Allison are conducting experiments in science class. In which experiment will the students most likely observe a new material being formed?

• melting ice in containers at different temperatures
• dissolving different amounts of salt into water
• boiling the same amount of different liquids
• burning different types of paper

Tags

NGSS.MS-PS1-2

When water freezes, a physical change has occurred. Which is most likely a property of the material by this physical change?

• It will never be a liquid again.
• It will be in the form of a gas.
• It can be changed back into its original form.
• It can take the form of any container it is put in.

Tags

NGSS.MS-PS1-4