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WorksheetsAmplify Phase Change Assessment Review
Total questions: 24
Worksheet time: 19mins
During a science class, Jayne and Rico observed an ice cube melting into water. Which of the following explains the movement of the ice cube's molecules?
The molecules started moving in place.
The molecules began moving away from each other.
The molecules began moving around each other.
The molecules stopped moving altogether.
Serenity and Elliot are studying two liquids, A and B, at room temperature. When they remove energy from both, only liquid A turns into a solid. What does this suggest about liquid A?
It has weaker molecular attractions than liquid B.
It has stronger molecular attractions than liquid B.
Its molecules move faster at lower temperatures.
Its molecules are unaffected by energy changes.
During a science experiment, Maddie adds energy to a liquid in a beaker and observes that the molecules begin to move freely in all directions. What phase change occurred?
Solid to liquid
Liquid to gas
Gas to solid
Liquid to solid
Ariana and Miles are observing a pond as winter approaches. What happens to the water molecules in the pond when energy is transferred out, and the water freezes?
The molecules move faster and farther apart.
The molecules move slower and closer together.
The molecules stop moving altogether.
The molecules move in random directions.
Chase and Macey are conducting an experiment where they cool two different liquids. When cooled, Liquid A solidifies, but Liquid B remains liquid. Why?
Liquid A has a stronger molecular attraction than Liquid B.
Liquid A has weaker molecular attraction than Liquid B.
Liquid A’s molecules move faster than those in Liquid B.
Liquid A’s molecules resist energy removal more than Liquid B.
Eva and Trey are observing a cup of hot chocolate as it cools down. Which statement correctly describes what happens to the hot chocolate as its temperature decreases?
Its molecular kinetic energy increases, and the molecules move faster.
Its molecular kinetic energy decreases, and the molecules move slower.
Its molecular size increases, causing the substance to expand.
Its molecular size decreases, causing the substance to contract.
Mia and Nora are conducting an experiment with two different liquids. One liquid has weaker molecular attractions than the other. How will the liquid with weaker molecular attractions respond when energy is added?
It will change phase more easily than a substance with stronger attractions.
It will absorb energy without changing phase.
It will resist changes in phase regardless of energy transfer.
It will immediately freeze.
During a science experiment, Nour observed that a block of ice kept its shape even when placed on a table. Which statement best explains why the ice block keeps its shape?
Its molecules move freely around each other.
Its molecules are too small to move.
Its molecules only move in place, not around each other.
Its molecules move away from each other at high speeds.
Grant and Liam are observing a balloon filled with air. What happens to the air molecules inside the balloon that make it different from the molecules in a solid or liquid?
They move in place but maintain a fixed shape.
They move around each other but stay close.
They move away from each other, spreading out.
They stop moving and remain in one position.
Grace and Axel are watching ice melt into water. This phase change involves:
Molecules changing their shape permanently.
A visible change caused by a change in the molecules' freedom of movement.
The creation of entirely new molecules in a substance.
A permanent loss of molecular attraction.
Amalia and Izzy are heating a pot of water on the stove. What happens at the molecular level when energy is transferred to the water?
The attraction between molecules increases.
The molecules’ kinetic energy increases, and they move faster.
The molecules’ size decreases.
The molecules become solid.
Leila leaves an ice cube on the kitchen counter. What determines whether a phase change will occur in the ice cube?
Max and Sam are comparing two different liquids in their science class. Which liquid will require more energy to change from liquid to gas?
A liquid with strong molecular attractions.
A liquid with weak molecular attractions.
A liquid with no molecular attractions.
A liquid that is already a gas.
Isaac and Elliot are discussing how temperature affects the movement of molecules in a pot of boiling water. Which of the following best describes the relationship between temperature and molecular motion?
Higher temperatures decrease the motion of molecules.
Lower temperatures increase the kinetic energy of molecules.
Temperature measures the average kinetic energy of molecules in a substance.
Temperature is unrelated to molecular motion.
During a science experiment, Avery and Paige observed a block of ice melting into water. What property of the ice does not change even during this phase change?
The freedom of movement of its molecules.
The molecular attraction between its molecules.
The kinetic energy of its molecules.
The appearance of the substance at the macroscale.
Catherine and Veah are watching water turn into ice in their freezer. What happens at the molecular level during this freezing process?
Kinetic energy increases, overcoming molecular attraction.
Kinetic energy decreases, allowing molecular attraction to pull molecules closer together.
Molecules lose their attraction to each other entirely.
Lincoln and Eli are conducting an experiment with two different liquids. If these liquids have different molecular attractions, how might they respond differently to the same energy increase?
The liquid with weaker molecular attractions will change phase more easily.
Both liquids will change phase at the same time.
The liquid with stronger molecular attractions will always remain a solid.
The liquid with weaker molecular attractions will never change phase.
Label the diagram with the appropriate word to describe changing the state of matter.
condensation
imitation
deposition
freezing
melting
evaporation
sublimation
Kristen and Clyde are making pasta together. On the stove, when they heat water until it bubbles, the water is changing from a (a) to a (b) . This phase of matter change is called (c) .
sublimation
Draw the molecules of a gas.
Jayne and Elliot are conducting an experiment to compare the melting points of two elements: aluminum (660°C) and sodium (98°C). Which element has stronger molecular attractions, and why?
Aluminum, because its higher melting point indicates stronger molecular attractions.
Aluminum, because its lower melting point indicates weaker molecular attractions.
Sodium, because its higher melting point indicates stronger molecular attractions.
Sodium, because its lower melting point indicates weaker molecular attractions.
Jayne, Liam, Grace, and Trey are comparing the melting points of four elements for their science project:
Carbon: 3,550°C
Gold: 1,064°C
Lead: 327°C
Mercury: -39°C
Based on the melting points, which element do they find has the weakest molecular attraction?
Carbon
Gold
Lead
Mercury
Ariana and Mason are investigating two elements in their science class: iron (melting point: 1,538°C) and sulfur (melting point: 115°C). What conclusion can they make about the molecular attractions of these elements?
Iron has weaker molecular attractions than sulfur because it melts at a lower temperature.
Iron has stronger molecular attractions than sulfur because it melts at a higher temperature.
Sulfur has stronger molecular attractions than iron because it melts at a higher temperature.
Sulfur and iron have the same molecular attractions because they are both solid at room temperature.
Leila, Mia, and Reese are conducting an experiment to compare the freezing points of three substances:
Water: 0°C
Ethanol: -114°C
Benzene: 5.5°C
Based on their results, which substance has the strongest molecular attraction, and why?
Water, because its freezing point is higher than ethanol's but lower than benzene's.
Ethanol, because its freezing point is the lowest, indicating weaker molecular attractions.
Benzene, because its higher freezing point suggests stronger molecular attractions.
Ethanol, because its freezing point is higher than benzene's and water's.
