(C7) Chem Unit Test REVIEW

Click all of the things that acid rain can damage.

• buildings

• statues

• plants

• animals

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

Why isn't this a chemical reaction?

CHOOSE ALL CORRECT ANSWERS

• this is a mixture

• bonds were NOT broken, atoms were NOT rearranged

• different number of atoms on both sides of the arrow

• molecules were rearranged

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How do we know if two unknown substances are the same or different?

CHOOSE ALL CORRECT ANSWERS.

• Test the properties of both

• Different properties = different substances

• If the masses are different, they are different substances

• Different properties before and after a reaction means that a chemical reaction has occurred

Tags

NGSS.MS-PS1-2

Melting, evaporating, cutting, freezing, and breaking are all examples of:

• chemical changes

• physical changes

• open systems

• closed systems

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Choose ALL measurements that would NOT be helpful in determining if substances are the same or different.

• mass

• length

• shape

• volume

How many neutrons?

• 8

• 15.9994

• 7.9994

• 7

Tags

NGSS.MS-PS1-1

Water has a pH of...

• 2

• 7

• 9

• 14

How would you determine if a new substance was made during a chemical reaction?

CHOOSE ALL CORRECT ANSWERS

• test the properties before and after the reaction

• different properties = different substances

• test the properties of the product

• same properties = different substances

Tags

NGSS.MS-PS1-2

Rusting, rotting, spoiling, burning, frying, and baking are all examples of:

• chemical changes

• physical changes

• open systems

• closed systems

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the main cause of acid rain?

• air pollution

• water pollution

• sound pollution