Test - Unit 2 Matter

Question 1

Three examples of physical changes are…

Answer 1

Boiling water, blowing up a balloon, and melting ice

U2 C2 pg. 10

Question 2

Matter in which the particles are free to move in all directions until they have spread evenly throughout their container is a…

Answer 2

Gas

U2 C3 pg. 27

Question 3

_______ is another name for a homogenous mixture

Answer 3

Solutions

U2 C1 pg.3

Question 4

Milk, paint, and mayonnaise are all examples of…

Answer 4

Heterogenous Mixture

U2 C1 pg.3

Question 5

The particles in a liquid are usually…

Answer 5

Closer together and lower in energy than in a gas

U2 C3 pg. 27

Question 6

Which of the following liquids would be the most viscous?

Answer 6

Syrup

U2 C2 pg. 8

Question 7

Salad dressing

Answer 7

Heterogenous

U2 C1 pg. 3

Question 8

Lemonade

Answer 8

Homogenous

U2 C1 pg. 3

Question 9

Peanut Butter

Answer 9

Heterogenous

U2 C1 pg.3

Question 10

Gas to liquid

Answer 10

Condensation

U2 C3 pg. 28

Question 11

List the 3 points in the kinetic-molecular theory.

Answer 11

All matter is made of small particles. (atoms, ions, molecules, etc.)

Those particles are in constant random motion

This motion causes the particles to collide with each other and the container that they are in

U2 C3 pg. 26

Question 12

List and explain the 3 factors that increase the solubility (dissolving) rate of a substance.

Answer 12

Smaller solute size
— Increases the surface area on the solute so the solvent has more places for contact

Heating the solvent
— Increasing the temperature increases the kinetic energy of the particles, therefore more collisions

Stirring the solution
— Brings fresh solve it into contact with him dissolved solute

U2 C4 pg. 33