Unit Review

• Both are elements.

• Both are compounds.

• Water is a compound, and oxygen is an element.

• Water is an element, and oxygen is a compound.

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DOK Level 2: Skill/Concept

• 6

• 12

• 18

• 24

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DOK Level 2: Skill/Concept

Which of the following is a chemical change?

• Melting ice

• Dissolving sugar in water

• Burning wood

• Breaking glass

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DOK Level 2: Skill/Concept

What happens to the concentration of a solution when more solute is added to a fixed amount of solvent?

• The concentration decreases.

• The concentration remains the same.

• The concentration increases.

• The concentration becomes zero.

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DOK Level 2: Skill/Concept

Which factor will increase the rate of dissolution of a solid solute in water?

• Decreasing the temperature

• Increasing the surface area of the solute

• Decreasing the agitation

• Using a larger container

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DOK Level 2: Skill/Concept

• It is made of two different elements chemically combined.

• It is found on the periodic table.

• It cannot be broken down into simpler substances.

• It is a pure substance.

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DOK Level 3: Strategic Thinking

• 1

• 2

• 4

• 6

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DOK Level 2: Skill/Concept

Which of the following scenarios best illustrates a physical change?

• Iron rusting

• Baking a cake

• Evaporating water

• Digesting food

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DOK Level 2: Skill/Concept

Describe how dilution affects the concentration of a solution.

• Dilution increases the concentration.

• Dilution decreases the concentration.

• Dilution has no effect on concentration.

• Dilution doubles the concentration.

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DOK Level 2: Skill/Concept

How does increasing temperature affect the rate of dissolution of a solid solute in water?

• It decreases the rate of dissolution.

• It has no effect on the rate of dissolution.

• It increases the rate of dissolution.

• It stops the dissolution process.

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DOK Level 2: Skill/Concept