MJ3 Study Guide Chemical Changes

Physical changes only change ...

• the form of the substance (like size or shape)

• the color of the substance (like red to blue)

• the chemicals of the substance (like hydrogen into water)

• the part that is visible

Examples of physical changes are ...

(check all that apply)

• cutting

• breaking

• boiling

• melting

Chemical changes create ...

• new atoms

• new chemicals

• new shapes

• new sizes

Examples of chemical changes are ...

(check all that apply)

• rotting

• rusting

• baking

• digesting

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

If you want to separate a mixture, you need to use ...

• only physical changes

• only chemical changes

• both physical and chemical changes

• neither physical nor chemical changes

Signs that a chemical change has occurred are:

(check all that apply)

• producing a gas

• color change

• releasing heat, light and sound energy

• making an odor

Tags

NGSS.MS-PS1-2

Look at the picture:

What kind of change is this?

• physical change

• chemical change

• neither physical change nor chemical change

• both a physical and a chemical change

What does the Law of Conservation of Mass state?

• matter cannot be created.

• matter cannot be destroyed.

• both answers are right.

• neither answer is right

Which types of changes adhere to the Law of Conservation of Mass?

(check all answers that apply)

• physical changes

• chemical changes

Tags

NGSS.MS-PS1-5

Look at the picture:

How do you know that mass is conserved?

• There are the same number and color of atoms on both sides of the arrow.

• There are more atoms on one side of the arrow than on the other side.

• The atoms are different colors on one side of the arrow.

• Mass is NOT conserved in a chemical change