Important Terms

Question 1

Matter

Answer 1

Anything that has mass and volume

Tree, person, atoms

Question 2

Pure Substance

Answer 2

A chemical that is made up of only one kind of particle and have a fixed or constant structure

Hydrogen, pure water, salt

Question 3

An element

Answer 3

Pure substances made up of only one type of atom

hydrogen, carbon, nitrogen

Question 4

A compound

Answer 4

Pure substances made up of at least two different elements

Sodium bicarbonate, CO2

Question 5

Mixtures

Answer 5

Either heterogeneous or homogeneous in appearance; contain more than one pure substance

Soil

Question 6

Homogeneous Mixtures (Solutions)

Answer 6

A mixture that looks the same throughout

Salty water, KoolAid

Question 7

Mechanical mixture

Answer 7

Type of heterogeneous mixture that has very easily visible parts (or phases)

table , water bottle, trial mix

Question 8

Emulsion

Answer 8

Type of heterogeneous mixture that has two liquids in it

Wet ingredients in batters, oil+vinegar

Question 9

Suspensions

Answer 9

Type of heterogeneous mixture that has small solids suspended in it for a relatively short period of time

Flour and water, pond water,

Question 10

Colloid

Answer 10

Type of heterogeneous mixture which has very small particles mixed into it; particles remain “suspended” indefinitely; particles can only be seen as distinct by using a microscope

Fog, milk, whipped cream

Question 11

Physical change

Answer 11

Change is state, appearance etc. A new substance is not found

Dissolving, melting, boiling, evaporating, condensing, sublimation, ripp

Question 12

Chemical reaction

Answer 12

Type of change that involves making a new
chemical

Baking soda and vinegar,

Question 13

Density

Answer 13

The degree of compactness of a substance

The density of a substance is 25g/L

Question 14

Malleability

Answer 14

A metal’s ability to be hammered into a sheet

gold, tinfoil

Question 15

ductility

Answer 15

The ability of a substance to be shaped into a thin wire or thread

Gold and silver are ductile while bromine is not

Question 16

Viscosity

Answer 16

The ability for a liquid to flow

Water is more viscus than glue

Question 17

Qualitative property

Answer 17

A physical property you can not put a number to or a definite answer

Melting point, density, electrical conductivity

Question 18

Quantitative

Answer 18

Type of property that involves measurement

Melting point, density, electrical conductivity

anything with a number

Question 19

Solubility

Answer 19

The mass of solute able to dissolve into a solvent at a particular temperature

sugar dissolves into warm or hot water better than cold water.

Question 20

conductivity

Answer 20

Whether or not a material carries electricity or heat, thermal

Copper is very conductive, heat conductivity

metals are good with electrical and heat

Question 21

solute

Answer 21

Substance which dissolves into a solvent

powder when making kool aid

the sugar in the sugae and water

Question 22

solvent

Answer 22

A substance that is able to dissolve another substance

water when making kool aid

the water in the sugar and water

Question 23

Shiny or dull - lustre

Answer 23

Shininess of an object

Most metals are shiny and transition metal may not be

metals are lusturs

Question 24

hardness

Answer 24

How hard or soft an object is, can it easy

Clay is soft and easily shaped but rocks are hard and don’t change shape

dimoands are the hardest

Question 25

Chemical reaction

Answer 25

Putting two solutions together and something happening like a sudden colour | suggests that a chemical reaction has happened unexpected colour change

Question 26

Brittleness

Answer 26

Ability of a substance to break when hammered/struck | Glass is very brittle compared to rock