Amplify Science Phases Change

Detectives find two substances at a crime scene. One is a poison, and the other is a cleaning chemical. At room temperature, both substances are liquids. To test the substances, the detectives transfer the same amount of energy into both substances, but only the cleaning chemical changes phase. How is the cleaning chemical different from the poison?

• weaker attraction between its molecules than the poison. Its molecules now move in place.

• weaker attraction between its molecules than the poison. Its molecules now move away from each other.

• stronger attraction between its molecules than the poison. Its molecules now move away from each other.

• stronger attraction between its molecules than the poison. Its molecules now move around each other.

Tags

NGSS.MS-PS1-4

You have two substances at room temperature. Both substances are a liquid. You transfer the same amount of energy out of both substances but only one substance changes phase. What happened?

• the substance with the weaker attraction will change to a gas

• the substance with the stronger attraction will turn to a solid

• the substance with the stronger attraction will turn to a gas

• the substance with the weaker attraction will turn to a solid

Tags

NGSS.MS-PS1-4

Owen found two different substances when he was locked in the basement. Substance 1 and 2 were both liquids at room temperature. He was bored so he took away the same amount of kinetic energy out of both substances, but only substance 1 changed phase. How are the substances different?

• Substance 1 has a weaker attraction between its molecules than Substance 2. Its molecules now move in place.

• Substance 1 has a weaker attraction between its molecules than Substance 2. Its molecules now move around each other.

• Substance 1 has a stronger attraction between its molecules than substance 2. Its molecules now move away from each other.

• Substance 1 has a stronger attraction between its molecules than substance 2. Its molecules now move in place.

Tags

NGSS.MS-PS1-4

Molecules flowing freely around their entire area and/or container.

• solid

• liquid

• gas

• none of the above.

Refrigerators are able to transfer energy out of a substance. At first, the substance is a gas. The refrigerator changes the phase of the substance by transferring energy out of it. How does this change affect the substance’s molecules? After the phase change, the molecules move . . .

• slower, and they move away from each other.

• slower, and they move around each other.

• faster, and they move around each other.

• faster, and they move in place.

Tags

NGSS.MS-PS1-4

Two different cars, the Model S and Model T, use different substances in their engines. The image above shows the two substances. At room temperature, both substances are liquids. A car mechanic transferred the same amount of energy out of the two containers, but only one substance changed phase. Which car’s substance changed phase, and how did it change?

• The Model T’s substance changed phase because the attraction of the molecules was able to overcome their slower movement. Its molecules now move in place.

• The Model T’s substance changed phase because the strong attraction between the molecules made their movement slower. Its molecules now move in place.

• The Model S’s substance changed phase because the weak attraction between the molecules allowed them to move faster. Its molecules now move around each other.

• The Model S’s substance changed phase because the attraction was able to overcome the slower molecules. Its molecules now move away from each other.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

An Earth scientist brought an unknown substance from underground back to her lab. The substance was in the gas phase and was put into a sealed tank. She slowed down the molecules inside the tank and the substance changed phase. How did she do this, and how did it affect the molecules?

• into the substance, and the molecules moved around each other.

• into the substance, and the molecules moved away from each other.

• out of the substance, and the molecules moved around each other.

• out of the substance, and the molecules moved in place

Tags

NGSS.MS-PS1-4

You find a substance in your water bottle. The molecules in the bottle are moving around each other. You increase the speed of the molecules and cause a phase change. How did you do this and how did this affect the substance? You transferred energy....

• into the substance and it changed to a gas

• into the substance and it changed to a liquid

• out of the substance and it changed to a solid

• out of the substance and it changed to a liquid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Will a phase change always occur when you transfer energy into or out of substance?

• Yes

• No

Tags

NGSS.MS-PS1-4

You leave a glass of cold water on the table in the morning. When you come home after school the glass of water is warm. what happened to the water molecules while you were at school?

• the molecules moved closer together

• the molecules started moving faster

• then water lost cold molecules

• the molecules became larger

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5