Unit 4: Chemical Changes - Formation of a New Substance

Which of these is an example of physical change?

• rusting metal

• burning wood

• browning fruit

• melting ice

Flammability is an example of a -

• change in state

• physical property

• chemical property

• change in density

Rusting and tarnishing are examples of -

• corrosion

• physical changes

• flammability

• changes in states of matter

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Matter that is flammable can -

• float in water

• tarnish

• put out a fire

• burn

Which is of these is the best evidence that a chemical change has happened?

• shape has changed

• liquid changed into solid

• size became smaller

• new substance formed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Signs of a chemical change do NOT include -

• bubbling

• changing odor

• melting point

• changing color

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Changes in matter can be -

• chemical

• physical

• both chemical and physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Physical changes include all of the following except for-

• shredding paper

• baking a cake

• building a house

• boiling water

Tags

NGSS.5-PS1-4

Physical changes

• change the appearance of a substance

• do not create a new substance

• can be observed without changing the substance

• all of the above

If a gas is produced, you may observe

• bubbling

• fizzing

• foaming

• a change in smell

• all of the above

Tags

NGSS.MS-PS1-2