3.20

What can solutions be made of?

• Only liquids.

• Only gases.

• Solids, liquids, or gases.

• Only solids.

Can mixtures and solutions be separated?

• Yes, both can be separated

• No, neither can be separated

• Only mixtures can be separated

• Only solutions can be separated

What is a common misconception about mixtures and solutions?

• Mixtures cannot be separated into their components

• Solutions are a type of mixture

• Mixtures and solutions are the same

• The substance that dissolves in a solution disappears

What do some students incorrectly believe about the substance that dissolves in a solution?

• It changes into a different substance

• It can never be retrieved again

• It simply disappears

• It remains unchanged

Which tool is best suited for separating iron filings from sand?

• Tweezers

• Magnet

• Colander

• Beaker of water

What is the best method to separate a mixture of sand and water?

• Using a magnet

• Using tweezers

• Using a colander

• Using filter paper and a funnel

Which of the following statements is true about a mixture of white and black marbles?

• The mixture will all be the same color.

• The mixture will maintain its physical properties.

• The mixture will change its state of matter.

• The mixture will have less volume.

Which mixture can the student separate most easily with the magnet?

• Salt and water

• Iron nails and water

• Shampoo and water

• Sand and water

A student is given a beaker containing gravel and water. Which of these ways could the students NOT use to separate the gravel from water?

• Boil the mixture to evaporate the water

• Pass a magnet over the mixture

• Pour the mixture through a paper filter

• Use tweezers

What is the result of combining two or more different substances?

• A. A mixture

• B. A chemical reaction

• C. A compound

• D. A solution