Unit 6, lesson 2 Pre-assessment

In a colloid, particles are scattered throughout and block the passage of light.

• True

• False

Tags

NGSS.MS-PS4-2

Distillation is often used to make colloids.

• True

• False

Using a magnet is one way to separate a mixture of sand particles and water.

• True

• False

Distillation uses the different boiling points of substances to separate them.

• True

• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Mixing food coloring with water is an example of a chemical change.

• True

• False

Tags

NGSS.MS-PS1-2

What is a physical combination of two or more substances that are blended together without forming a new substance?

• solute

• solvent

• distillation

• mixture

If you mix salt that has a mass of 5 grams with water that has a mass of 7 grams,  what will be the mass of the salt water?

• a. 7 grams because the salt will dissolve

• b. 5 grams because the salt has a mass of 5 grams

• c. 12 grams because both the masses will add together

• d. 57 grams because 5 and 7 make 57

Which would make a sugar and water solution more dilute?

• a. Let water evaporate away.

• b. Add sugar and stir.

• c. Add water and stir.

• d. Heat to boil away water.

How are temperature and solubility related?

• a. the lower the temperature of the solvent, the higher the solubility

• b. the higher the temperature of the solvent, the higher the solubility

• c. the higher the temperature of the solvent, the lower the solubility

• d. temperature does not affect solubility

The maximum amount of a solute that can dissolve in a solvent is called the _____.

• a. alloy

• b. solubility

• c. solvent

• d. colloid