Evidence of Chemical Change

Iron rusts

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is NOT evidence of a chemical change?

• Unexpected color change

• gas produced

• breaking

• temperature change (with no outside heat added)

Tags

NGSS.MS-PS1-2

Which of the following options provides evidence of a CHEMICAL change?

• Wood is burned releasing ash and smoke

• Rocks separate when soil is sifted

• Boiling water bubbles when heated

• Salt dissolves in water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of these indicates that a chemical change occured during an experiment?

• a solid formed when two liquids were mixed

• there was no temperature change during the experiment

• there was no change in mass during the experiment

• one substance was more dense than the other

Tags

NGSS.MS-PS1-2

In a controlled experiment, acid was dropped on a sample of chalk. Which of the following results would show that a chemical reaction took place?

• The sample of chalk formed a wet puddle on its surface

• The sample of chalk had partially dissolved.

• The sample of chalk formed bubbles, showing a release of gas

• The sample of chalk broke into smaller pieces

Tags

NGSS.MS-PS1-2

The best evidence for the formation of a new substance is the observation of the

• solid settling

• solid disappearing

• liquid remaining clear

• bubbles forming

Tags

NGSS.MS-PS1-2

Which of these observations from a burning candle are NOT evidence of a chemical change?

• The wax is melting

• Smoke is produced

• Heat is released

Tags

NGSS.MS-PS1-2

A change that results in the formation of new chemical substances

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Fizzing, foaming, and burning are all examples of

• Chemical change

• Physical change

Tags

NGSS.MS-PS1-2

Which of these is a result of a chemical change?

• A mixture

• A solution

• A new substance

• Melting or freezing

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5