Science Review - Part 3

Reem gets a new silver bracelet. After a few days, the bracelet tarnishes and leaves a black ring on Ivan's arm. What type of change does the bracelet undergo?

• A. chemical change
• B. a matter change
• C. physical change

Which of the following is a solution?

• A. sugar and water
• B. sand and water
• C. muddy water

The substance that dissolves a solute.

• A. Mixture
• B. Solvent
• C. Solution

Sara mixes juice powder in the water. She notices that the juice powder dissolves. Based on her observations, what can Sara conclude?

• A. The juice powder is a solute.
• B. The juice powder is a solvent.
• C. The juice powder is a solution.

In Luna's experiment, milk acts as a solvent. Why is this statement true?

• A. The milk evaporates.
• B. The milk changes state.
• C. The milk dissolves the sugar.

Tyrell makes salad dressing. He puts 150 mL of oil and 150 mL of vinegar in a jar and shakes it. After 5 minutes, the oil is on top of the vinegar. What can Tyrell conclude about the salad dressing?

• A. Oil is a solvent and vinegar is a solute.
• B. More oil is needed to dissolve the vinegar.
• C. The oil and vinegar have formed a mixture.

Physical changes happen when a substance changes, but its composition doesn't. Which of the following is a physical change?

• A. Burning
• B. Freezing
• C. Decaying

Which of the following is the ability to cause change in matter?

• A. Energy
• B. Freezing
• C. Decaying

Of a compost pile is a clue that waste is rotting to form new substances.

• A. Smell
• B. Change of shape
• C. Change of size

An ... often speeds up a chemical reaction.

• A. Increase in temperature
• B. Decrease in temperature
• C. Temperature has no effect