Which state of matter has a definite volume but no definite shape?

• Solid

• Liquid

• Gas

• Plasma

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DOK Level 3: Strategic Thinking

Compare the molecular arrangement of solids and gases. Which statement is true?

• Molecules in solids are more spread out than in gases.

• Molecules in gases are tightly packed.

• Molecules in solids are tightly packed, while in gases they are far apart.

• Molecules in both solids and gases are arranged randomly.

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DOK Level 3: Strategic Thinking

Explain why ice melts into water when heated.

• The molecules in ice gain energy and move closer together.

• The molecules in ice lose energy and move apart.

• The molecules in ice gain energy and move apart, breaking the rigid structure.

• The molecules in ice lose energy and form a rigid structure.

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DOK Level 3: Strategic Thinking

Analyze the behavior of water molecules as it transitions from liquid to gas.

• Molecules lose energy and move closer together.

• Molecules gain energy and move further apart.

• Molecules lose energy and form a rigid structure.

• Molecules gain energy and move closer together.

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DOK Level 3: Strategic Thinking

Which phase change involves a substance going directly from a solid to a gas?

• Melting

• Freezing

• Sublimation

• Condensation

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DOK Level 3: Strategic Thinking

Apply your understanding of states of matter to explain why a balloon expands when heated.

• The air molecules inside the balloon lose energy and move closer together.

• The air molecules inside the balloon gain energy and move further apart.

• The air molecules inside the balloon lose energy and form a rigid structure.

• The air molecules inside the balloon gain energy and move closer together.

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DOK Level 3: Strategic Thinking

Identify the state of matter that is characterized by having a fixed shape and volume.

• Liquid

• Gas

• Solid

• Plasma

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DOK Level 3: Strategic Thinking

Compare the compressibility of gases and liquids. Which statement is true?

• Gases are less compressible than liquids.

• Liquids are more compressible than gases.

• Gases are more compressible than liquids.

• Both gases and liquids are equally compressible.

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DOK Level 3: Strategic Thinking

Explain the process of condensation in terms of molecular behavior.

• Molecules gain energy and move further apart.

• Molecules lose energy and move closer together.

• Molecules gain energy and form a rigid structure.

• Molecules lose energy and move further apart.

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DOK Level 3: Strategic Thinking

Analyze why a solid changes to a liquid at its melting point.

• The molecules lose energy and form a rigid structure.

• The molecules gain energy and move closer together.

• The molecules gain energy and move apart, overcoming the forces holding them in place.

• The molecules lose energy and move apart.

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DOK Level 3: Strategic Thinking