Amplify Phase Change

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

• evaporation 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 to overcome the M.A.

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

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

The cleaning chemical has a . . .

• 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.

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

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Divers found two substances at the bottom of the ocean. At room temperature, both substances are liquid. Scientists then transferred the same amount of energy out of both substances. When a scientist checked again, Substance 1 had changed phase, but Substance 2 had not. How are Substances 1 and 2 different?

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

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

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

• stronger attraction between its molecules than Substance 2. Its molecules now move in place.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

There is a safe chemical and a toxic chemical, and both are liquids at room temperature. When the same amount of energy is transferred out of the two chemicals, only the toxic chemical changes phase. How is the toxic chemical different from the safe chemical? The toxic chemical has a . . .

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

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

• stronger attraction between its molecules than the safe chemical. Its molecules now move in place.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A noticeably different form or state of the same substance

• Mixture

• Phase

• Mass

• Density

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A student left a sealed jar of water outside her home. Water can be a solid, liquid, or gas. When she put it outside, the water was a solid. Twelve hours later, the water had changed phase and was a liquid. What happened to the water molecules?

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

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

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

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

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A scientist has a container with a substance inside. At first, the molecules in the substance move away from each other. Later, the molecules move around each other. What change did the scientist observe in the substance?

• Before, the substance was a liquid. Later, it was a solid.

• Before, the substance was a gas. Later, it was a liquid.

• Before, the substance was a liquid. Later, it was a gas.

• Before, the substance was a solid. Later, it was a liquid.

Tags

NGSS.MS-PS1-4

A cook had a jar containing a sweet food and a jar containing a sour food. The image above shows the sweet and sour foods. At room temperature, both foods are liquids. The same amount of energy was transferred into both substances. Later, one of the foods had changed phase while the other had not. Which food changed phase, and how did it change?

• The sweet food changed because the molecules were able to move fast enough to overcome the attraction between them. Its molecules now move away from each other.

• The sweet food changed because the strong attraction between molecules made their movement slower. Its molecules now move around each other.

• The sour food changed because the weak attraction between molecules let them move faster. Its molecules now move away from each other.

• The sour food changed because the molecules were able to move fast enough to overcome the attraction between them. Its molecules now move in place.

Tags

NGSS.MS-PS1-4

What happens to the molecular attraction during the phase change from liquid to gas?

• A) It increases significantly.

• B) It decreases significantly.

• C) It remains the same.

• D) It fluctuates randomly.

Tags

NGSS.MS-PS1-4

Which of the following best describes the energy change during the phase transition from solid to liquid?

• A) Energy is absorbed to overcome molecular attraction.

• B) Energy is released as molecules move closer.

• C) Energy remains constant throughout the process.

• D) Energy is absorbed to decrease molecular attraction.

Tags

NGSS.MS-PS1-4