states of matter+

Question 1

atom

Answer 1

basic unit of matter

Question 2

element

Answer 2

simplest substance, only one type of atom

Question 3

living things are made of

Answer 3

CHNOPS (carbon) (hydrogen) (nitrogen) (oxygen) (phosphorus) (sulfur)

Question 4

allotrope

Answer 4

a different form of an element (ex. carbon (graphite and diamond))

Question 5

compound

Answer 5

composed of at least two different atoms BONDED together

Question 6

mixture

Answer 6

two or more substances PHYSICALLY mixed together

Question 7

homogeneous mixture

Answer 7

uniformly distributed substances (atmosphere)

Question 8

heterogeneous mixture

Answer 8

not evenly distributed, visually different (blood)

Question 9

distillation

Answer 9

separation technique by boiling one substance out (homogeneous mixtures)

Question 10

filtration

Answer 10

separation technique of a solid and liquid (heterogeneous mixtures)

Question 11

solid

Answer 11

fixed volume, fixed shape

Question 12

liquid

Answer 12

fixed volume, variable shape

Question 13

gas

Answer 13

variable volume, variable shape

Question 14

physical property

Answer 14

can be observed without changing chemical identity (mass)

Question 15

physical change

Answer 15

affects only physical properties (ice to water)

Question 16

chemical properties

Answer 16

observed when a substance reacts

Question 17

chemical change/reaction

Answer 17

process that produces one or more new substances

Question 18

5 evidences of chemical change?

Answer 18

1) gas is released
2) precipitate is formed
3) heat is absorbed or released
4) light is released
5) color change

Question 19

precipitate (ppt)-

Answer 19

insoluble solid produced when two clear liquids react

Question 20

chromatography

Answer 20

process used to separate components of a mixture

Question 21

absorbent

Answer 21

attracts and absorbs the materials to be separated

Question 22

solvent

Answer 22

carries the material to be separated