Chemical and Physical Changes

What is a common misconception about chemical changes?

• Chemical changes are caused by heat.

• Chemical changes are caused by mixing substances.

• Chemical changes are caused by phase changes.

• Chemical changes are caused by physical changes.

Which of the following is NOT a chemical change?

• Toast getting burnt in a toaster

• Ice cubes melting in a glass of water

• A metal spoon rusting

• Milk rotting in the fridge

Tags

NGSS.MS-PS1-2

What happens during a physical change?

• New substances are formed

• Different types of substances are mixed together

• The material changes forms but remains the same substance

• Heat is added to a solid

What is an example of a physical change?

• Mixing apples, bananas, and strawberries together

• Burning materials to create new substances

• Reacting different substances to create fizzing and bubbling

• Rusting metal or rotting food

What is a chemical change?

• A change where two or more substances are mixed together

• A change where a solid melts into a liquid

• A change where a new substance is formed

• A change where a gas condenses to a liquid

Tags

NGSS.MS-PS1-5

How do we know whether a change is physical or chemical?

• By observing the end product

• By conducting flame tests

• By mixing different substances

• By adding heat or cooling

Tags

NGSS.MS-PS1-2

What is a mixture?

• The physical combining of two or more materials

• The formation of a new substance

• The separation of different substances

• The observation of physical and chemical changes

Copper roof changing colour is an example of a _____ change.

Tags

NGSS.MS-PS1-2

Spoiling food is a _____ change?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A gel ice pack getting cold after you put it in the freezer for an hour is a _____ change.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4