Science Tek

What is the term used to describe the attraction between water molecules?

• Adhesion

• Cohesion

• Surface tension

• Capillary action

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DOK Level 1: Recall

TEKS.SCI.8.6C

Which property of water allows insects to walk on its surface?

• Adhesion

• Cohesion

• Surface tension

• Capillary action

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DOK Level 1: Recall

TEKS.SCI.8.6C

Describe how cohesion and adhesion contribute to capillary action in plants.

• Cohesion allows water molecules to stick to plant roots, while adhesion allows them to stick to each other.

• Cohesion allows water molecules to stick to each other, while adhesion allows them to stick to plant tissues.

• Cohesion allows water molecules to stick to plant tissues, while adhesion allows them to stick to each other.

• Cohesion and adhesion do not contribute to capillary action.

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DOK Level 2: Skill/Concept

TEKS.SCI.8.6C

Why does water bead up on a freshly waxed car surface?

• Because of the adhesive forces between water molecules and the wax.

• Because of the cohesive forces between water molecules and the wax.

• Because of the cohesive forces between water molecules and adhesive forces between water molecules and the wax.

• Because of the cohesive forces between water molecules and the lack of adhesive forces to the wax.

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DOK Level 2: Skill/Concept

TEKS.SCI.8.6C

Which observable phenomenon is a result of surface tension in water?

• Water forming a meniscus in a graduated cylinder

• Water droplets forming on a leaf

• Water rising in a thin tube

• Insects walking on water

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DOK Level 1: Recall

TEKS.SCI.8.6C

How does cohesion affect the shape of water droplets?

• It causes water droplets to spread out flat.

• It causes water droplets to form a spherical shape.

• It causes water droplets to form a cylindrical shape.

• It has no effect on the shape of water droplets.

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DOK Level 2: Skill/Concept

TEKS.SCI.8.6C

Analyze the role of cohesion and adhesion in the transport of water from roots to leaves in plants.

• Cohesion helps water molecules stick to plant roots, while adhesion helps them move up the plant.

• Cohesion helps water molecules stick to each other, while adhesion helps them stick to plant tissues and move up.

• Cohesion and adhesion both help water molecules stick to plant roots.

• Cohesion and adhesion do not play a role in water transport in plants.

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DOK Level 3: Strategic Thinking

TEKS.SCI.8.6C

Evaluate the importance of surface tension in the survival of certain insects.

• Surface tension allows insects to float on water without sinking.

• Surface tension allows insects to swim faster in water.

• Surface tension allows insects to dive deeper into water.

• Surface tension has no importance for insects.

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DOK Level 3: Strategic Thinking

TEKS.SCI.8.6C

What is the effect of capillary action on water movement in a plant stem?

• It causes water to move downward.

• It causes water to move upward.

• It causes water to stay still.

• It has no effect on water movement.

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DOK Level 1: Recall

TEKS.SCI.8.6C

Predict what would happen to water transport in plants if cohesion between water molecules was significantly reduced.

• Water transport would increase.

• Water transport would decrease.

• Water transport would remain the same.

• Water transport would stop completely.

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DOK Level 3: Strategic Thinking

TEKS.SCI.8.6C