PHASE CHANGE

The way molecules in a substance move around relative to each other

• Kinetic Energy

• Molecule

• Phase

• Freedom of Movement

The energy that an object has because it is moving

• Molecule

• Refute

• Density

• Kinetic Energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A pull between two molecules that is always the same for a substance

• Kinetic Energy

• Molecular Attraction

• Molecule

• Mixture

If a substance has molecules moving in place, undergoes a phase change, and now has molecules moving around each other it has changed from a.......

• solid to a gas

• gas to a liquid

• solid to liquid

• liquid to a solid

What type of substance has molecules that can move away from each other?

• solid

• liquid

• gas

If you add kinetic energy to a substance are you increasing or decreasing the freedom of movement of the molecules?

• increasing

• decreasing

Blake is doing a science experiment with a substance in a sealed jar. At first, the substance’s molecules are moving around each other. What will happen to Blake’s substance if he transfers energy out of the substance and causes a phase change? After the phase change, the substance’s molecules will move . ..

• faster and be a gas

• faster and be a liquid

• slower and be a liquid

• slower and be a solid

Cohen had a Popsicle but left it out and it started to melt. What caused the Popsicle to melt?

• kinetic energy was taken away from the Popsicle

• kinetic energy was added to the Popsicle

• Cohen doesn't deserve treats if he is going to waste them

Substance A has a strong attraction between its molecules and substance B has a weak attraction between its molecules. They are both liquids at room temperature. If the same amount of kinetic energy is added to them which substance is more likely to change to a gas?

• substance a

• substance b

Substance B is a liquid in a sealed container. Brock removed kinetic energy from the substance by putting it in the refrigerator next to his headcheese and cow tongue sandwich. Substance B underwent a phase change. What happened?

• The molecules slowed down and substance b is now a solid.

• The molecules slowed down and substance b is now a liquid.

• The molecules are moving faster and substance b is now a gas.

• The molecules are moving faster and substance b is now a solid.