CBA Corrections

Which of the following best describes a compound?

• A substance made of two or more elements chemically combined in a fixed ratio.

• A mixture of different substances that can be physically separated.

• A single element in its pure form.

• A solution of gases.

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DOK Level 2: Skill/Concept

What is the primary difference between cohesion and adhesion?

• Cohesion refers to the attraction between different substances, while adhesion refers to the attraction between similar substances.

• Cohesion refers to the attraction between similar substances, while adhesion refers to the attraction between different substances.

• Cohesion and adhesion both refer to the attraction between similar substances.

• Cohesion and adhesion both refer to the attraction between different substances.

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DOK Level 2: Skill/Concept

On a pH scale, which of the following numbers represents a neutral solution?

• 0

• 7

• 14

• 10

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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 best describes the law of conservation of matter?

• Matter can be created and destroyed in chemical reactions.

• Matter is neither created nor destroyed in chemical reactions.

• Matter can be transformed into energy.

• Matter is always conserved in physical changes but not in chemical reactions.

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DOK Level 2: Skill/Concept

• 2 m/s²

• 5 m/s²

• 10 m/s²

• 20 m/s²

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DOK Level 2: Skill/Concept

Which of the following is an example of a mixture?

• Air

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DOK Level 2: Skill/Concept

What is the net force acting on an object if two forces, 5 N to the right and 3 N to the left, are applied to it?

• 2 N to the right

• 2 N to the left

• 8 N to the right

• 8 N to the left

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DOK Level 2: Skill/Concept

Which of the following statements is true about surface tension?

• It is the force that causes a liquid to spread out evenly over a surface.

• It is the force that causes a liquid to form droplets.

• It is the force that causes a liquid to evaporate quickly.

• It is the force that causes a liquid to freeze.

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DOK Level 2: Skill/Concept

• 1

• 2

• 3

• 4

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DOK Level 2: Skill/Concept