chapter 7 review

Question 1

What happens when ice left on counter

Answer 1

melting

Question 2

What happens when frost forms on the window on a cold day

Answer 2

deposition

Question 3

What happens when water is left in a freezer

Answer 3

solidification

Question 4

What happens when clothes left out to dry

Answer 4

evaporation

Question 5

What happens when dry ice is used to create fog

Answer 5

sublimation

Question 6

What happens when the bathroom mirror gets fogged up after a shower

Answer 6

condensation

Question 7

What happens when a pond gets shallower at the end of a long hot summer

Answer 7

evaporation

Question 8

What happens when your hair was wet when you left the house, but dries by the time you get to school

Answer 8

evaporation

Question 9

What happens when the ice cream you are eating drips down your arm

Answer 9

melting

Question 10

What happens when a full pot of soup fills only half of the pot after simmmering for 2 hours

Answer 10

evaporation

Question 11

What happens when liquid glass cools and hardens

Answer 11

Deposition ? solidification

Question 12

What happens when a cold drink is wet on the outside of the glass

Answer 12

condensation

Question 13

What is the formula for density?

Answer 13

mass/volume mass divided by volume

Question 14

the more energy particles have

Answer 14

the faster they move

Question 15

when temperature of a solid, liquid or gas decreases

Answer 15

the particles slow down, lose energy, have less space between them

Question 16

What is the temperature at which a solid turns to a liquid?

Answer 16

the melting point

Question 17

Why do highway bridges have gaps built into them

Answer 17

for thermal expansion

Question 18

when the thermal energy of a substance increases, its particles move father apart and as a result

Answer 18

density decreases?

Question 19

the temperature at which a liquid turns to gas

Answer 19

evaporation

Question 20

the amount of space taken up by a substance

Answer 20

volume

Question 21

change in state from gas to solid

Answer 21

Deposition

Question 22

can be liquid or gas

Answer 22

fluid

Question 23

mass per unit of volume

Answer 23

density decreases?

Question 24

change in state from liquid to gas

Answer 24

evaporation

Question 25

change in state from solid to gas

Answer 25

evaporation

Question 26

what is the difference between heat and thermal energy

Answer 26

heat is the amount of energy transferred between two objects and thermal energy is the amount of total energy (?)

Question 27

why does a cold drinking glass crack when placed in very hot water?

Answer 27

There is an uneven thermal expansion, so the thin parts heat quickly from the water, the thick parts slower, so the brittle glass cracks.