Phase Change Unit Review

Poll

How confident are you for this assessment?

• I got this!

• I feel pretty good

• I definitely need to review....

• I am getting nervous

Multiple Select

Ok, easy start - what are the three main states (or phases) of matter? (select all that apply)

• solid

• liquid

• gas

• plasma

Fill in the Blanks

Which state of matter is the least energetic?

Fill in the Blanks

Which state of matter is moderately (in the middle) energetic?

Fill in the Blanks

Which state of matter is the most energetic?

Multiple Choice

How do we describe the way molecules move in a solid?

• molecules move in place

• molecules move around each other

• molecules move away from each other?

Multiple Choice

How do we describe the way molecules move in a liquid?

• molecules move in place

• molecules move around each other

• molecules move away from each other?

Multiple Choice

How do we describe the way molecules move in a gas?

• molecules move in place

• molecules move around each other

• molecules move away from each other?

Draw

Draw the molecules in a solid:

Fill in the Blanks

What is the phase change from a solid to a gas called? (Note: This phase change does NOT include a liquid phase)

Fill in the Blanks

Let's say I show you a substance and the molecules are moving around each other. Then, I leave that substance out in the open overnight and come back. Now the substance is a gas. Do the molecules have more or less kinetic energy now?

Multiple Choice

Which phase of matter has molecules that move the fastest?

• solid

• liquid

• gas

Multiple Choice

Which phase of matter has molecules that move the slowest?

• solid

• liquid

• gas

Multiple Choice

True or False: All phase changes are driven by energy transferring into or out of a substance.

• True

• False

• Talse

• Frue

Multiple Choice

If we transfer energy out of a substance with molecules moving away from each other and it changes phase, how will the molecules move now?

• they will move in place

• they will move around each other

• they will move away from each other

Draw

Draw the molecules in a liquid:

Draw

Draw the molecules in a gas: