Property Changes in Chemical Reactions

What is the law of conservation of mass?

• Mass can be created or destroyed in a chemical reaction

• The total mass before a chemical reaction is the same as the total mass after a chemical reaction

• Every reaction creates an equal amount of mass related to the amount of energy required for the reaction

• The total amount of mass is equal to the volume of both chemicals in the reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When a substance undergoes a chemical change, its identity does not change.

• True

• False

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• bending a pop can

• evaporating of milk

• melting wax

• burning paper

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NGSS.MS-PS1-2

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

• magnet sticking to a fridge

• dew disappearing from the grass

• mashing potatoes

• frying a hamburger

Tags

NGSS.MS-PS1-2

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

• lighting a match

• dissolving salt into water

• freezing water

• breaking a glass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Evidence of a chemical change is

• color

• odor

• giving off light

• all options

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NGSS.MS-PS1-2

You are handed a piece of paper and asked to cause a chemical change. What do you do?

• crumble it

• burn it

• leave it out in the sun

• draw on it

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5