Chemical Changes

1. Which occurs when atoms link together in new ways to create a substance different from the original substances?

• physical change

• chemical change

• sudden change

• gradual change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

2. Which is an example of a chemical reaction?

• ice melting

• salt stirred into water

• wood burning

• rain falling

Tags

NGSS.MS-PS1-2

3. CHOPPING a piece of wood and BURNING it demonstrates _______________________.

• chemical change; physical change

• physical change; chemical change

• physical change; sudden change

• chemical change; gradual change

Tags

NGSS.MS-PS1-2

4. Which of the following indicate that a chemical reaction has occurred?

• formation of gas bubbles

• change in color

• odor

• all of these indicate a chemical reaction

Tags

NGSS.MS-PS1-2

5. Which demonstrates a chemical property of water?

• The ability to dissolve

• its melting point

• the ability to react with sodium

• the ability to freeze

6. Properties that are observed when matter changes

• sudden properties

• magnetic properties

• physical properties

• chemical properties

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

7. The temperature at which a substance melts is called its ____________.

• boiling point

• melting point

• freezing point

• evaporation

Tags

NGSS.MS-PS1-4

8. A substance at the end of a chemical reaction.

• product

• reactant

• precipitate

• colloid

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

9. An original substance at the beginning of a chemical reaction.

• product

• reactant

• precipitate

• colloid

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

10. A solid formed from the chemical reaction of some solutions.

• product

• reactant

• precipitate

• colloid

Tags

NGSS.MS-PS1-2