Amplify Chapter 3 Phase Change Key Concept

Are there molecules moving in a solid brick?

• yes
• no
• maybe
• not sure

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

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NGSS.MS-PS1-4

When molecules move slower, kinetic energy

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

What is the measurement of kinetic energy called?

• volume

• temperature

• pressure

• movement

All phase changes (changing states) require some amount of energy to be added or taken away.

• True

• False

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NGSS.MS-PS1-4

In our Amplify story, the liquid methane lake...

• EVAPORATED

• FROZE

• CONDENSED

• SUBLIMATED

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NGSS.MS-PS1-4

When the liquid methane lake evaporated...

• the kinetic energy increased and the molecules moved further apart.

• the kinetic energy decreased and the molecules moved further apart.

• the kinetic energy increased and the phase changed to solid methane.

• the kinetic energy decreased and the phase change that occurred was melting.

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NGSS.MS-PS1-4

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In our Amplify story, the methane lake did not evaporate right away because...

• evaporation of any liquid always takes a long time to occur.

• the kinetic energy from the Sun quickly overcame the molecular attraction in the methane.

• the methane has high molecular attraction, so it took a lot of energy from the Sun over several years to overcome the attraction.

• the lake was in winter up until 2007, so it could not get enough energy from the Sun to vaporize.

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NGSS.MS-PS1-4

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Which two factors affect whether or not a phase change happens?

• Kinetic Energy and Temperature

• Molecular Attraction and Kinetic Energy

• Type of molecule and type of container

• Season and Location

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NGSS.MS-PS1-4

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Which is the best definition of "molecular attraction"?

• Molecules that get close together and bond to make a new molecule.

• The pull between molecules that is always the same for a substance.

• The way that all molecules in a solid have the same pull or attraction, no matter what the substance is made of.

• How fast or quickly molecules move in a substance.