Test Bank 2

Question 1

Any sample of matter has mass and takes up space. The main reason for this is because:

Answer 1

Matter is made up of tiny particles that have mass and take up space

Question 2

Water drops stay together on wax paper and they don’t break apart easily. This is mainly because:

Answer 2

Water molecules are attracted to each other

Question 3

When you bring two drops of water near each other and allow them to touch, they combine immediately and become one drop. This is mainly because:

Question 4

If you put food coloring in room temperature water, the coloring spreads throughout the water. The water causes the color to spread mainly because:

Question 5

Food coloring spreads out faster in hot water than in cold water. This is mainly because:

Question 6

When a thermometer is heated, the red liquid inside the thermometer moves up. This is mainly because:

Question 7

When a thermometer is cooled, the red liquid inside the thermometer moves down. This is mainly because:

Question 8

When you heat a sample of a solid, the particles that make up the solid:

Question 9

When you heat a sample of a solid, the sample gets a little bigger. This is mainly because:

Question 10

When you heat a sample of gas, what happens to the particles that make up the gas?

Question 11

To describe a liquid, you could say:

Question 12

To describe a solid, you could say:

Question 13

To describe a gas, you could say:

Question 14

If the particles of a liquid are always moving, why don’t they all come apart from each other and become a gas?

Question 15

What can you infer about water molecules based on this observation?

Question 16

What can you infer about water molecules based on these observations?

Question 17

What do the circles and lines tell you about the arrangement, spacing, and speed of water molecules in room temperature water?

Question 18

What does this amazing fact tell you about the size of water molecules?

Question 19

What differences would you expect if, at the same time, you place yellow and blue food coloring in both hot and cold water?

Question 20

Compare the speed of molecules in hot water compared to molecules in cold water?

Question 21

Why does the red liquid move up the tube when a thermometer is heated?

Question 22

Why does the red liquid move down the tube when a thermometer is cooled?

Question 23

Why does that happen?

Question 24

Do you think that the particles of a solid or liquid are more attracted to each other? Why?

Question 25

Explain how the motion and attractions of the atoms in the metal ball cause it to get slightly larger when heated.

Question 26

Describe what happens on the molecular level when a solid is heated.

Question 27

In the demonstration with the metal ball and ring, why didn’t the ball fit through the ring after the ball was heated with a Bunsen burner?

Question 28

If the metal ring was cooled a lot, and the metal ball was at room temperature, would the ball still fit through the ring?

Question 29

Why is the door hard to open and close on hot days?

Question 30

Is gas matter? How do you know?

Question 31

Why does a bubble form on the top of the bottle placed in hot water?

Question 32

Why does the bubble shrink when the bottle is placed in cold water?