1.2: investigating matter

Question 1

boiling point

Answer 1

the temperatures at which a liquid changes to a gas

Question 2

conductivity

Answer 2

the ability to conduct electricity or heat

Question 3

density

Answer 3

the ratio of a materials mass to its volume D=m/v

Question 4

element

Answer 4

a pure substance that cannot be broken down or separated into simpler substances.

Question 5

Mass

Answer 5

the amount of matter in a substance or a object, the more matter, the greater the mass. usually measured in kilograms.

Question 6

Matter

Answer 6

anything that has mass and volume

Question 7

Melting point

Answer 7

the temperature at which a solid begins to liquify

Question 8

State

Answer 8

a property of a substance describing it as a solid, liquid or gas

Question 9

volume

Answer 9

the amount of space taken up by a substance

Question 10

Chemical change

Answer 10

a change in matter that occurs when substances combine to form new substances. this new mixture causes reactions

Question 11

changes of state

Answer 11

a change in one of the three states: solid, liquid, or gas

Question 12

what do particles in a solid state look like?

Answer 12

particles in a solid state are packed together tightly

Question 13

what do particles in a liquid state look like?

Answer 13

particles in a liquid state are in contact with each other but are not as nearly as close as particles that are solid.

Question 14

what do particles in gas look like?

Answer 14

particles in gas have very large spaces between them. in fact gas is mostly empty space

Question 15

condensation

Answer 15

the change of state in which gas turns into liquid

Question 16

solidification/freezing

Answer 16

the change of state in which liquid turns into solid

Question 17

sublimation

Answer 17

the change of state in which solid turns into gas

Question 18

deposition

Answer 18

the change of state in which gas turns into solid

Question 19

qualitative properties

Answer 19

properties that can be described but not measured

Question 20

quantitative properties

Answer 20

properties that can be measured numerically

Question 21

pure substances

Answer 21

substances that are only made up of one kind of matter (gold, water, oxygen). There are two kinds of pure substances

Question 22

an element is

Answer 22

pure substance that cannot be broken down or separated into simpler substances (gold, water or oxygen)

Question 23

a compound is

Answer 23

pure substance composed of at least two elements combined in a specific way, ie water is a compound of the element hydrogen and oxygen>