Amplify Phase Change Assessment Review

During a science class, Waverly 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.

Tags

NGSS.MS-PS1-4

Matthew and Elijah 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.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A scientist adds energy to a substance and observes that the molecules move from around each other to moving freely in all directions. What phase change occurred?

• Solid to liquid

• Liquid to gas

• Gas to solid

• Liquid to solid

Tags

NGSS.MS-PS1-4

Farah and Kailyn 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.

Tags

NGSS.MS-PS1-4

Tatum and Harper 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.

Tags

NGSS.MS-PS1-4

Porter and Luke 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.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Graham and Edris 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.

Tags

NGSS.MS-PS1-4

During a science experiment, Sahasra 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.

Amelia and Samantha 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.

Tags

NGSS.5-PS1-1

A 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.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4