Chemical Reactions

The smell your dog makes after eating to much people food.

• Chemical Change

• Physical Change

Tags

NGSS.MS-LS1-7

NGSS.MS-PS1-2

The smell made from spraying perfume on yourself. 

• Chemical Change

• Physical Change

___________________ are the elements are compounds that leave (are formed in) a chemical
reaction.

• Polymers

• Bonds

• Reactants

• Products

Tags

NGSS.MS-PS1-5

Which of the following IS a physical change?

• Getting a haircut

• Rusty metal

• sour milk

• A compound

An gel ice pack getting cold after you put it in the freezer for an hour.

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

a copper penny turning greenish after a few years.

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-2

How many F atoms are in this compound?
6MgF₂ 

• 2

• 6

• 8

• 12

Tags

NGSS.MS-PS1-1

How many Al atoms are in this compound?         4Al₂O₃

• 2

• 8

• 6

• 4

Tags

NGSS.MS-PS1-1

The Law of Conservation of Mass states

• that matter exists in all states and reacts the same

• that matter can only be changed into new substances by introducing a catalyst

• that matter exists in the same state throughout any chemical change

• that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants

Tags

NGSS.MS-PS1-5

In a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what?

• Reactants

• Products

• Atoms

• Catalysts

Tags

NGSS.MS-PS1-2