Which of the following is a chemical change?

• Melting ice

• Burning wood

• Breaking glass

• Dissolving sugar in water

Tags

DOK Level 2: Skill/Concept

TEKS.SCI.7.6C

Which of the following best describes a physical change?

• Rusting of iron

• Baking a cake

• Freezing water

• Digesting food

Tags

DOK Level 2: Skill/Concept

TEKS.SCI.7.6C

What happens to the solution concentration when more solute is added to it?

• The concentration decreases.

• The concentration remains the same.

• The concentration increases.

• The solution becomes saturated.

Tags

DOK Level 2: Skill/Concept

TEKS.SCI.7.6D

Which of the following describes a dilute solution?

• A solution with a high concentration of solute.

• A solution with a low concentration of solute.

• A solution with equal amounts of solute and solvent.

• A solution with no solute.

Tags

DOK Level 2: Skill/Concept

TEKS.SCI.7.6D

What happens to the concentration of a solution when it is diluted?

• The concentration increases.

• The concentration decreases.

• The concentration remains the same.

• The solution becomes saturated.

Tags

DOK Level 2: Skill/Concept

TEKS.SCI.7.6D

Which of the following best describes a concentrated solution?

• A solution with a high concentration of solute.

• A solution with a low concentration of solute.

• A solution with equal amounts of solute and solvent.

• A solution with no solute.

Tags

DOK Level 2: Skill/Concept

TEKS.SCI.7.6D

What is the result of adding more solvent to a solution?

• The concentration increases.

• The concentration decreases.

• The concentration remains the same.

• The solution becomes saturated.

Which of the following is an example of a mixture?

• Salt (NaCl)

• Air

• Iron (Fe)

What is the effect of temperature on the solubility of most solid solutes in water?

• Solubility decreases with an increase in temperature.

• Solubility remains the same regardless of temperature.

• Solubility increases with an increase in temperature.

• Solubility becomes zero at higher temperatures.

Tags

NGSS.MS-PS1-4

Which of the following is an example of a homogeneous mixture?

• Sand and salt

• Oil and water

• Vinegar

• Iron filings and sulfur