Phase Change - Unit Test Study Guide - Amplify

Front

How is the toxic chemical different from the safe chemical when the same amount of energy is transferred out of both, causing only the toxic chemical to change phase?

Back

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

Front

What change did Lily, Charlotte, and Kai observe to the water when the ice melted?

Back

At first, the water was a solid. Later, it was a liquid.

Front

How would the phase change occur, and how would the molecules of the substance be affected under extreme conditions?

Back

Energy would be transferred INTO the substance, and its molecules would move around each other.

Front

Which substance changed phase when the same amount of energy was transferred into both, and why?

Back

The substance with weaker molecular attraction or a lower boiling point changed phase, allowing its molecules to move apart more easily.

Front

How does the phase change in a freezer affect the refrigerant's molecules?

Back

slower, and they move around each other.

Front

Mino and Nimo collected snow in a jar, left it outside, and it melted into water. What happened to the water molecules in the jar?

Back

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

Front

Ethan, Aria, and Elijah discovered two liquid substances in Africa. After energy was removed, Substance 1 changed phase, but Substance 2 did not. How are they different?

Back

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

Front

What could have happened to the water molecules in the lake when the temperature rose?

Back

The molecules started moving faster.

Front

During a science experiment, Daniel and Kai had a container of two substances, substance #1 and substance #2. At room temperature, both substances were liquids. They transferred the same amount of energy INTO both substances. After a few hours, they noticed that one of the substances had changed phase, while the other did not. Emma, their classmate, was asked to predict which substance would most likely change phases, and explain why?

Back

Emma predicted that the substance #1 changed because the molecules were able to move fast enough to overcome the attraction between them. Its molecules now move away from each other.

Front

How is the pink liquid different from the green liquid when both are at room temperature and the same amount of energy is transferred into both?

Back

weaker attraction between its molecules than the green liquid. Its molecules now move away from each other.