physical properties and changes of matter

Question 1

density

Answer 1

the ratio of mass to volume

depends on the unique structure of the substance.

can be used to identify a substance

Question 2

physical properties of matter

Answer 2

mass, volume, and density

those that can change the state without changing the identity of the substance

Question 3

mass

Answer 3

the specific number of molecules

Question 4

volume

Answer 4

the amount of space taken up by the number of molecules.

Question 5

gram

Answer 5

metric unit of mass

Question 6

states of matter

Answer 6

solid, liquid, gas, and plasma

Question 7

above absolute zero, molecules are

Answer 7

in constant motion

Question 8

kinetic molecular theory

Answer 8

the molecules that make up all matter are in constant motion.

basically, molecular motion changes as heat is added or removed.

Question 9

phase change depends on two conditions

Answer 9

temperature and pressure

Question 10

the triple point

Answer 10

solid, liquid, and gas coexist

Question 11

critical point

Answer 11

liquid and gas coexist

Question 12

sublimation

Answer 12

transition of a substance from a solid to a gas without passing through the liquid state.

ex: dry ice going from solid to a gas at room temperature.

Question 13

deposition

Answer 13

a gas directly converts to a solid

ex: water vapor in cold temperatures turning into ice crystals

Question 14

how to find density

Answer 14

mass/volume