PC Review Ch.1 + 2

PC Review Ch.1 + 2

Multiple Choice

When energy is transferred into a substance...

• kinetic energy, temperature, and speed changes

• Only temperature changes

Multiple Choice

The colder a substance is, the

• less freedom of movement it has

• more freedom of movement it has

Multiple Choice

The hotter a substance is, the

• less freedom of movement it has

• more freedom of movement it has

Yellow arrow= energy transferred in

Green arrow= energy transferred out

Multiple Choice

Phase change going from a Solid to a Liquid...

• Freezing

• Condensation

• Melting

• Sublimation

Multiple Choice

Phase change going from Liquid to Solid...

• Melting

• Freezing

• Condensation

• Sublimation

Multiple Choice

The opposite phase of evaporation is 

• freezing 
• melting
• condensation 

Multiple Choice

The opposite phase of melting is 

• freezing 
• evaporation
• condensation 

Multiple Choice

Phase change from a gas to a liquid.

• condensation
• evaporation
• melting
• freezing

Multiple Choice

Which of the following terms identifies the change from a liquid to solid?

• Melting
• Condensation
• Evaporation
• Freezing

Multiple Choice

Which of the following terms identifies the change from a liquid to gas?

• Evaporation
• Condensation
• Melting
• Freezing

Multiple Choice

A student left a sealed jar of water in her freezer. When she returned twelve hours later, the water had changed phase and was a solid. What happened to the water molecules?

• Before, the molecules were moving in place. After, the molecules were moving around each other.

• Before, the molecules were moving around each other. After, the molecules were moving in place.

• Before, the molecules were moving away from each other. After, the molecules were moving around each other.

Multiple Choice

Which phase can the molecules flow around each other and take the shape of a container?

• Solid
• Liquid
• Gas

Multiple Choice

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

Multiple Choice

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

Multiple Choice

Lily 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 Lily’s substance if she transfers energy into the substance and causes a phase change?

After the phase change, the substance’s molecules will move . . .

• faster, and the substance will be a liquid.

• faster, and the substance will be a gas.

• slower, and the substance will be a solid.

• slower, and the substance will be a liquid.

Multiple Choice

Scientists digging in a cave found an unknown substance. The scientists found that the substance’s molecules were moving around each other. The scientists increased the speed of the substance’s molecules and caused a phase change. How did the scientists do this, and how did this affect the substance?

The scientists transferred energy . . .

• into the substance, and the substance changed into a gas.

• into the substance, and the substance changed into a liquid.

• out of the substance, and the substance changed into a solid.

• out of the substance, and the substance changed into a liquid.

Multiple Choice

What is the energy that an object has because it is moving?

• kinetic
• potential
• electric
• wind

Multiple Choice

The "measure of the average kinetic energy of the molecules of a substance" is also known as:

• temperature

• heat

• potential energy

• speed

Multiple Choice

A "measure of how hot or cold something is" is called:

• temperature

• heat

• kinetic energy

• potential energy

Multiple Choice

A DECREASE in molecules' motion is evidence that:

• their kinetic energy has DECREASED

• their kinetic energy has INCREASED

• their kinetic energy has STAYED THE SAME

Multiple Choice

An INCREASE in molecules' motion is evidence that:

• their kinetic energy has INCREASED.

• their kinetic energy has DECREASED.

• their kinetic energy has STAYED THE SAME.

Multiple Choice

When energy is REMOVED from a substance, it leads to:

• a DECREASE in the kinetic energy of the molecules that make up that substance

• an INCREASE in the kinetic energy of the molecules that make up that substance

• NO CHANGE in the kinetic energy of the molecules that make up that substance

• BOTH a simultaneous INCREASE and DECREASE in the kinetic energy of the molecules that make up that substance

Multiple Choice

When energy is ADDED to a substance, it leads to:

• an INCREASE in the kinetic energy of the molecules that make up that substance

• a DECREASE in the kinetic energy of the molecules that make up that substance

• NO CHANGE in the kinetic energy of the molecules that make up that substance

• BOTH a simultaneous INCREASE and DECREASE in the kinetic energy of the molecules that make up that substance

Multiple Choice

If you want to CONDENSE a gas, you have to:

• transfer energy OUT of it

• transfer energy into it

• keep the energy the same

• transfer energy both INTO and OUT of it at the same time

Multiple Choice

If you want to FREEZE a solid, you have to:

• transfer energy OUT of it

• transfer energy INTO it

• keep the energy the same

• transfer energy both INTO and OUT of it at the same time

Multiple Choice

If you want to EVAPORATE a liquid, you have to:

• transfer energy INTO it

• transfer energy OUT of it

• keep the energy the same

• transfer energy both INTO and OUT of it at the same time

Multiple Choice

If you want to MELT a solid, you have to:

• transfer energy INTO it

• transfer energy OUT of it

• keep the energy the same

• transfer energy both INTO and OUT of it at the same time

Multiple Choice

If energy is transferred OUT OF a substance, the substance will:

• gets warmer/hotter

• gets cooler/colder

• stay the same temperature

Multiple Choice

If energy is transferred INTO a substance, the substance will:

• get warmer/hotter

• get cooler/colder

• stay the same

Multiple Choice

When a substance gets hotter or warmer, its freedom of movement:

• increases

• decreases

• stays the same

Multiple Choice

When a substance heats up, its freedom of movement:

• increases

• decreases

• stays the same

Multiple Choice

When a substance gets colder, its freedom of movement:

• increases

• decreases

• stays the same

Multiple Choice

When a substance cools down, its freedom of movement:

• decreases

• increases

• stays the same

Multiple Choice

Which of the following causes a substance's freedom of movement to DECREASE?

• condensing

• evaporating

• melting

• energizing

Multiple Choice

Which of the following causes a substance's freedom of movement to DECREASE?

• freezing

• melting

• evaporating

• stagnating

Multiple Choice

Which of the following causes a substance's freedom of movement to INCREASE?

• freezing

• evaporating

• condensing

• regulating

Multiple Choice

Which of the following causes a substance's freedom of movement to INCREASE?

• freezing

• melting

• condensing

• activating

Multiple Choice

If you transfer energy out of a substance how will the movement of the molecules change?

• molecules will move faster

• molecules will move slower

• molecules will stop moving

• molecules do not move

Multiple Choice

If you transfer energy into a substance how will the molecules change?

• molecules will move faster

• molecules will move slower

• molecules will stop moving

Multiple Choice

How do the molecules in a liquid behave

• do not move

• move away from each other

• move in place

• move around each other

Multiple Choice

How do the molecules in a gas behave?

• move in place

• move around each other

• move away from each other

• do not move

Multiple Choice

How do the molecules in a solid behave?

• Move around each other

• move in place

• Moving away from each other

• Do not move

Multiple Choice

What happens to molecules when their kinetic energy decreases?

• They move slower.

• They move faster.

• They get heavier.

• It depends on the type of molecules.

Multiple Choice

The diagram above describes the movement of molecules in a substance used to make fuel. What change did the fuel scientist observe in the substance?

• Before the process, the substance was a solid. After the process, it was a liquid.

• Before the process, the substance was a gas. After the process, it was a liquid.

• Before the process, the substance was a liquid. After the process, it was a solid.

• Before the process, the substance was a liquid. After the process, it was a gas.

  Before the process, the substance was a liquid. After the process, it was a gas.

Multiple Choice

The medicine in the diagram above has molecules that are moving around each other. The doctor needs to slow down the molecules enough to cause a phase change. How will she do this, and how will this affect the medicine?

She transfers energy . . .

• into the medicine until it is a liquid.

• into the medicine until it is a gas.

• out of the medicine until it is a solid.

• out of the medicine until it is a liquid.

Multiple Choice

A measure of how hot or cold something is

• Phase

• Molecule

• Density

• Temperature

Multiple Choice

The energy that an object has because it is moving

• Molecule

• Refute

• Density

• Kinetic Energy

Multiple Choice

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

• Kinetic Energy

• Molecule

• Phase

• Freedom of Movement