Physical and Chemical Changes Review

Which example best describes a physical change?

• baking a pie
• burning a candle
• making a paper airplane
• mixing vinegar with baking soda

Which is an example of a chemical change?

• melting ice to make water
• baking cake batter to make a cake
• putting cheese on bread to make a cheese sandwich
• cutting an orange into slices for a snack

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Gwen’s family built a wood fire in the fireplace. The next day, Gwen 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-PS1-5

Salt dissolves in water

• physical Change
• chemical change

Tags

NGSS.MS-PS1-4

A change that alters the physical properties(appearance) of a substance without changing what the substance is MADE of (composition)!

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-4

Ice cubes melting is a _________________ change.

• chemical

• physical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In science, a law is:

• A rule governing what you are permitted to do

• A generalization about how the physical universe works

• A legal document that describes a rule of conduct

• A statue enacted by a legislative body

What is true if a substance with a lot of mass?

• It contains a lot of matter

• It has a large volume

• It has a high density

• It has a low frequency

The law of conservation of mass says substances can neither be _____ or _____.

• built, torn

• blended, separated

• created, destroyed

• condensed, extracted

In a chemical reaction, 4 grams of sodium must combine with how many grams of chlorine to produce 10 grams of table salt?

• 4 grams

• 6 grams

• 8 grams

• 10 grams