Phase Change III

When a substance melts, the kinetic energy _____________.

• decreases
• stays the same
• increases
• decreases then increases

Tags

NGSS.MS-PS1-4

If this substance had kinetic energy ADDED, it would be in what phase?

• solid
• liquid
• gas
• plasma

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Sam had a solid and added energy to it. What did the molecules look like?

• The molecules moved in place.
• The molecules moved away from each other.
• The molecules didn't move.
• The molecules moved around each other.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Before: molecules move around each other, After: molecules move in place

• Before, the substance was a solid and later a liquid.
• Before,the substance was a gas, and later a liquid.
• Before, the substance was a liquid and later a solid.
• Before,the substance was a liquid, and later a gas.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

If energy is taken out of the substance, and the substance changed into a liquid,

• the substance started as a solid
• the substance started as a liquid
• the substance stayed the same
• the substance started as a gas

Tags

NGSS.MS-PS1-4

What happens to molecules when kinetic energy increases?

• they move slower
• they move faster
• they get heavier
• it depends on the types of molecules

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-1

When molecules move slower, kinetic energy

• increases
• stays the same
• decreases
• none of these

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-1

7. All phase changes (changing states) requires energy to be added or taken away.

• True
• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What happens to particles when they are heated?

• They speed up and spread out
• They slow down and compress
• They stop moving
• They move closer together and speed up

Tags

NGSS.MS-PS1-4

What happens to particles when they are heated?

• They speed up and spread out
• They slow down and compress
• They stop moving
• They move closer together and speed up

Tags

NGSS.MS-PS1-4