Properties of Matter Test

Question 1

What does a phase change diagram look like?

Answer 1

A line graph showing the changes throughout a certain substance.

Question 2

What are the different phases in a phase change diagram?

Answer 2

When heating: Solid, Melting, Liquid, vaporization, Gas. When cooling: Gas, Condensation, Liquid, Freezing, Solid.

Question 3

What is the similarity between sublimation and deposition:

Answer 3

Deposition and sublimation are both phase changes between solids and gas.

Question 4

How does the mass of water change when it goes through a phase change?

Answer 4

It stays the same

Question 5

What effect does salt have on the boiling and melting points of water?

Answer 5

Makes boiling point increase and melting point decrease

Question 6

Where will heat transfer from when two objects contact each other? When will this transformation of heat stop?

Answer 6

From hot to cold, when the two objects have equal temp.

Question 7

Which way does heat travel when ice cubes are placed in warm water?

Answer 7

From the water to the ice cubes.

Question 8

Define Conduction and provide an example:

Answer 8

Process where heat energy is transmitted through direct contact. Ex. Electrical current when a light is turned on.

Question 9

What are the formulas for Density, volume, and mass?

Answer 9

D=M/V, M=DV, V=D/M

Question 10

How do the molecules in a substance change their spacing and movement as it changes from a solid to a liquid to a gas?

Answer 10

Solid: Particles are close together and not moving. Liquid: Particles are moving slightly faster, and are a little further apart. Gas: Particles are spread out and are moving very fast.

Question 11

Does mass change when a substance undergoes phase change?

Answer 11

No, Mass stays the same

Question 12

Should the mass of a solution change when you dissolve one thing in another? (i.e. salt in water) If there is a change, what could it be attributed to?

Answer 12

No, it should not change. If there was change, it could be attributed to human error or equipment error.

Question 13

How did we determine the density of air?

Answer 13

We measured the mass of the beaker before, and then used air pumps in order to pump out as much air from the beaker as possible. Then, we measured the mass of the beaker after, and used volume and mass to calculate the density of the air itself.

Question 14

How does temperature effect density?

Answer 14

The cooler the temperature, the greater the more dense. The hotter the temperature, the less dense.

Question 15

What happened when we placed metal in the burner?

Answer 15

It began to bend.

Question 16

what do engineers due to prevent cracking in roadways where road meets bridge.

Answer 16

They leave a crack in between, so that the road will have room to expand without cracking.

Question 17

What effect does temp have on solubility?

Answer 17

The greater the temp, the more soluble an object will be. The less the temp, the less soluble.

Question 18

How can you tell if a solution is saturated?

Answer 18

When the solvent has dissolved the solute to its maximum ability.

Question 19

When mixing water and alcohol, which changes more significantly: Volume or Mass?

Answer 19

Volume

Question 20

How does experiment and equipment error effect our labs?

Answer 20

Equipment error: Scale could not be accurate, Equipment may be damaged. Experimental error: Could be hard to read beaker/test tube.

Question 21

What are characteristic properties?

Answer 21

Properties unique to a certain substance

Question 22

Why aren’t volume and mass characteristic properties?

Answer 22

Characteristic properties do not change. On the other hand, mass and volume change depending on what the substance is, since they are forms of measurement.