states of matter

Question 1

liquid

Answer 1

molecules can move freely around eachother but are still contained (a little bit more heat energy than solid)

shape: takes on container
volume: definite

Question 2

gas

Answer 2

molecules are wild and fly out as far as they can go (massive amount of heat energy)

shape: takes on container
volume: takes on container

Question 3

the key is the amount of heat energy at each state

Answer 3

(more heat = more energy)

Question 4

endothermic

Answer 4

gaining heat

Question 5

exothermic

Answer 5

losing heat

Question 6

freezing

Answer 6

• liquid to solid
• losing heat energy to enviroment (exothermic)
• cannot add “cold” - feeling of “cold” is just an absence of heat
• ex: water into ice, lava into rock

Question 7

melting

Answer 7

• solid to liquid
• adding heat energy (endothermic)
• ex: ice into water

Question 8

evaporating

Answer 8

• liquid to gas
• adding heat energy (endothermic)
• only happens 1 layer at a time (slow process)
• ex: pond in desert

Question 9

boiling

Answer 9

• liquid to gas
• adding heat energy (endothermic)
• think of as evaporation from inside out

Question 10

condensation

Answer 10

• gas to liquid
• losing heat energy
• is water falling out of air
• ex: water forming outside glass of ice water

Question 11

solid

Answer 11

molecules are lined up and vibrate (very low amount of heat energy)

shape: definite
volume: definite