Exploring Water and Matter Properties

Mia noticed that when she poured water into a glass, the water molecules seemed to stick together. What is the term used to describe the attraction between molecules of the same substance?

• Adhesion

• Cohesion

• Surface tension

• Capillarity

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DOK Level 1: Recall

TEKS.SCI.8.6C

Rohan is making a drink by mixing substances. Which of the following is an example of a homogeneous mixture?

• Salad

• Saltwater

• Sand and iron filings

• Oil and water

Tags

DOK Level 1: Recall

TEKS.SCI.8.6A

Elijah observed a small insect walking on the surface of a pond. What is the primary reason the insect can walk on water?

• Cohesion

• Adhesion

• Surface tension

• Density

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DOK Level 1: Recall

TEKS.SCI.8.6C

Which of the following is a compound?

• Oxygen

• Water

• Gold

• Helium

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DOK Level 1: Recall

TEKS.SCI.8.6A

Describe how the formation of water droplets on a leaf is related to cohesion and adhesion.

• Cohesion causes water molecules to stick to the leaf, while adhesion causes them to stick to each other.

• Adhesion causes water molecules to stick to the leaf, while cohesion causes them to stick to each other.

• Both cohesion and adhesion cause water molecules to stick to the leaf.

• Neither cohesion nor adhesion is involved in the formation of water droplets.

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DOK Level 2: Skill/Concept

TEKS.SCI.8.6C

Explain how you would classify a mixture of sand and salt.

• Element

• Compound

• Homogeneous mixture

• Heterogeneous mixture

Tags

DOK Level 2: Skill/Concept

TEKS.SCI.8.6A

Benjamin and Grace are observing how water moves up a plant stem. How can this pattern of water transport be explained using the properties of water?

• Water is transported due to its density.

• Water is transported due to cohesion and adhesion.

• Water is transported due to its boiling point.

• Water is transported due to its color.

Tags

DOK Level 2: Skill/Concept

TEKS.SCI.8.5A

Which of the following best describes a scientific model?

• A physical representation of a theory

• A detailed description of an experiment

• A mathematical equation

• A hypothesis

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DOK Level 1: Recall

TEKS.SCI.8.3A

Propose a solution to prevent water droplets from forming on a surface using your understanding of cohesion and adhesion.

• Increase the surface temperature

• Apply a hydrophobic coating

• Decrease the air pressure

• Use a rough surface

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DOK Level 3: Strategic Thinking

TEKS.SCI.8.3A

How does the classification of matter as elements, compounds, or mixtures help in understanding chemical reactions?

• It helps in predicting the color of the reaction.

• It helps in determining the physical state of the reactants.

• It helps in understanding the reactivity and interaction of substances.

• It helps in measuring the temperature of the reaction.

Tags

TEKS.SCI.8.6A

DOK Level 3: Strategic Thinking