Physical/Chemical Changes

What is happening in "W"? (Between the first sample and the second sample)

• Heat is added because the particles become closer together in the second one than in the first one.

• Heat is removed because the particles become further apart in the second one than in the first one.

• Heat is removed because the particles become closer together in the second one than in the first one.

• Heat is added because the particles become further apart in the second one than in the first one.

Tags

NGSS.MS-PS1-4

What is true about the red molecules of water?

• The water vapor molecules are further apart than the liquid molecules because heat was added.

• The liquid water molecules are further apart than the water vapor molecules because heat was added.

• There is no difference in the molecules.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What is happening in "X"? (Between the second sample and the third sample)

• Heat is added because the particles become closer together in the third one than in the second one.

• Heat is removed because the particles become further apart in the third one than in the second one.

• Heat is removed because the particles become closer together in the third one than in the second one.

• Heat is added because the particles become further apart in the third one than in the second one.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Cookie dough baking is a

• chemical change

• physical change

Tags

NGSS.MS-LS1-7

NGSS.MS-PS1-2

Burning toast is a

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

Cutting bread is a

• chemical change

• physical change

Melting butter is a

• chemical change

• physical change

Tags

NGSS.MS-PS1-4

Which of these does NOT indicate that a chemical change is taking place?

Jenna is making a pizza in the oven and.......

• ....it smells really good in the kitchen.

• ....the pizza crust begins to brown.

• ....the cheese melts on the pizza.

• ....the bacon that she added cooks so that it is no longer raw.

Tags

NGSS.MS-LS1-7

NGSS.MS-PS1-2

When gas forms, this is evidence (proof) that a ______ has taken place.

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

A mixture is evidence (proof) that a ______ has taken place.

• chemical change

• physical change