MIXTURES AND SOLUTIONS

Which of these is a method of separating solutions?

• separating by hand

• filtering

• evaporation

• screening

A substance that is dissolved by a solvent is called a ________.

• compound

• solution

• solute

• mixture

Trail mix (a combination of many different fruits and nuts) is an example of a __________.

• solution

• precipitate

• compound

• mixture

In a solution, the solvent _____________.

• becomes a solid

• becomes a gas

• dissolves a solute

• settles at the bottom of the solution

When a solution is evaporated, ________________.

• the solute remains exactly the same.

• the solute disappears.

• the solute drifts up into the atmosphere.

• the solute crystallizes.

In order to saturate a solution, _________________.

• add solute to the solvent.

• add solute to the solvent and stir lightly.

• add solute to the solvent and allow it to evaporate.

• add solute to the solvent until no more can be dissolved.

The Kool-Aid drink was the most concentrated when it was _______________.

• lighter in color and weaker in taste

• darker in color and weaker in taste

• lighter in color and stronger in taste

• darker in color and stronger in taste

Is a solution a mixture? Choose the correct explanation.

• Yes, because the materials are both solids.

• Yes, because two or more materials are being combined.

• No, because the solute dissolves into the solvent.

• No, because one material is a liquid and one is a solid.

To separate a mixture of gravel, flour, and salt, what would be the correct order?

• evaporation, coffee-filtering, screening

• screening, coffee-filtering, evaporation

• coffee-filtering, screening, evaporation

• evaporation, screening, coffee-filtering

Which of these materials is the most soluble in water?

• table salt

• baking soda

• citric acid

• none of the above