Section 1: Physical and Chemical Properties

Question 1

solid to gas

Answer 1

sublimation

Question 2

gas to solid

Answer 2

deposition

Question 3

liquid to gas

Answer 3

evaporation

Question 4

gas to liquid

Answer 4

condensation

Question 5

physical properties

Answer 5

describes physical appearance/composition
- colour, melting/boiling point
- malleability, ductility, conductivity

Question 6

malleability

Answer 6

how flexible it is

Question 7

ductility

Answer 7

can it be stretched into wires

Question 8

conductivity

Answer 8

will it carry an electrical current?

Question 9

chemical properties

Answer 9

how a substance interacts with others
seen only with chemical reactions
- salt reacts with water, air, iron to make rust

Question 10

physical change

Answer 10

change of states
dissolving
deformation
chemical bonds aren’t broken

Question 11

chemical change

Answer 11

leads to new substances
chemical bonds are broken and new bonds are made

Question 12

pure substance

Answer 12

only one kind of particle, unique properties

Question 13

elements

Answer 13

can’t be broken down any simpler
found in periodic table
- carbon, nitrogen, hydrogen, helium

Question 14

compounds

Answer 14

2+ elements combined chemically
unique properties
- water = hydrogen + oxygen
- sugar=carbon, hydrogen, oxygen

Question 15

mixture

Answer 15

combo. of pure substances - each substance remains in its pure form

Question 16

mechanical mixture
(hetero or homo?)

Answer 16

heterogeneous
diff. particles are visible
- soil, trail mix

Question 17

solution
(hetero or homo?)

Answer 17

homogeneous
multiple substances are dissolved making it look like one substance
- pen ink, cool aid, tap water,

Question 18

suspension

Answer 18

one substance is held within the other
cloudy
- tomato juice

Question 19

colloid

Answer 19

particles are so small that they cant be separated easily
- ketchup and milk

Question 20

physical change

Answer 20

usually easily reversible
chem. bonds not broken (ice and water r still H20)

Question 21

chemical change

Answer 21

creates new substance
chem. bonds are broken and reformed to something new
new materials have diff. properties
difficult to reverse (it at all)

Question 22

physical change clues

Answer 22

change of state, dissolving, or deformation

Question 23

chemical change clues

Answer 23

change in color
change in odour
formation of a precipitate (SOLID)
heat/light produced
gas is made (bubbles, fizz is proof)