Exploring States of Matter

Which of the following best describes the movement of particles in a solid when thermal energy is added?

• Particles move faster and spread apart.

• Particles move slower and come closer together.

• Particles remain stationary.

• Particles move in a circular motion.

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DOK Level 2: Skill/Concept

What happens to the density of a gas when it is compressed into a smaller volume?

• Density decreases.

• Density remains the same.

• Density increases.

• Density becomes zero.

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DOK Level 1: Recall

Explain how the addition of thermal energy affects the movement of particles in a liquid.

• Particles move slower and form a solid.

• Particles move faster and may become a gas.

• Particles stop moving.

• Particles move in a fixed pattern.

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DOK Level 2: Skill/Concept

A student observes that a balloon shrinks when placed in a freezer. Which of the following explains this observation?

• The particles in the balloon move faster and spread out.

• The particles in the balloon move slower and come closer together.

• The particles in the balloon stop moving.

• The particles in the balloon move in a circular motion.

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DOK Level 3: Strategic Thinking

Which state of matter has particles that are closely packed but can still flow past one another?

• Solid

• Liquid

• Gas

• Plasma

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DOK Level 1: Recall

Describe the change in particle movement when a solid is heated to become a liquid.

• Particles move slower and form a rigid structure.

• Particles move faster and slide past each other.

• Particles stop moving.

• Particles move in a fixed pattern.

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DOK Level 2: Skill/Concept

A block of ice is left in a warm room and begins to melt. What is happening to the particles in the ice?

• They are moving slower and forming a solid.

• They are moving faster and spreading apart.

• They are moving in a fixed pattern.

• They are stopping completely.

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DOK Level 3: Strategic Thinking

What is the primary difference in particle movement between a gas and a plasma?

• Particles in a gas move slower than in a plasma.

• Particles in a plasma are ionized and move faster.

• Particles in a gas are ionized and move faster.

• Particles in a plasma move slower than in a gas.

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DOK Level 2: Skill/Concept

If a liquid is cooled, what happens to its density?

• Density decreases.

• Density remains the same.

• Density increases.

• Density becomes zero.

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DOK Level 1: Recall

How does removing thermal energy from a gas affect its particles?

• Particles move faster and spread apart.

• Particles move slower and come closer together.

• Particles stop moving.

• Particles move in a fixed pattern.

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DOK Level 2: Skill/Concept