Chem 2 Review

The formula for sugar is C₆H₁₂O₆. What does that mean?

• It has 6 carbon, 6 hydrogen, and 6 oxygen atoms

• It has 6 carbon, 12 hydrogen and 6 oxygen atoms

• It has 6 calcium, 12 hydrogen, and 6 oxygen atoms

• It has 6 carbon, 12 helium, and 6 oxygen atoms

Tags

NGSS.MS-PS1-1

You can describe a lemon as being oval, yellow colored, and sour tasting. All of these are _________.

• Chemical properties

• Physical properties

• Chemical changes

• Physical change

Tags

NGSS.MS-PS1-2

All of the following are evidence that a chemical change has occurred except _____.

• formation of a precipitate when substances are mixed

• change in temperature when substances are mixed

• formation of a gas when substances are mixed

• dissolving of a substance when substances are mixed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which statement about a physical and chemical change is true?

• if matter changes size or shape, it indicates a chemical change

• if matter changes state of matter, it indicates a chemical change

• if matter changes in color, it is always a physical change

• a change in temperature often occurs during a chemical change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Classify each change as physical or chemical. Mark A for physical and B for chemical.

A saw cuts a log and creates sawdust.

• A

• B

Classify each change as physical or chemical. Mark A for physical and B for chemical.

Baking bread.

• A

• B

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Classify each change as physical or chemical. Mark A for physical and B for chemical.

The Statue of Liberty changes from copper to green.

• A

• B

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Classify each change as physical or chemical. Mark A for physical and B for chemical.

Chocolate syrup is dissolved in milk.

• A

• B

Classify each change as physical or chemical. Mark A for physical and B for chemical.

Leaves changing color in the fall.

• A. Physical change

• B. Chemical change

Tags

NGSS.MS-LS1-6

Using the box shown, what number represents the coefficient?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5