Unit 2 - Science (Matter)

Front 1

Matter

Back 1

anything that has mass and takes up space

Front 2

Chemistry

Back 2

the study of matter and how matter changes

Front 3

substance

Back 3

a single kind of matter that is pure, meaning it always has a specific makeup or coposition.

Front 4

physical property

Back 4

a characteristic of a substance that can be observed without changing it into another substance

Front 5

chemical property

Back 5

a characteristic of a substance that describes its ability to change into a different substance

Front 6

atom

Back 6

the basic particles from which all elements are made

Front 7

chemical bond

Back 7

a force of attraction between two atoms.

Front 8

Molecule

Back 8

a group of two or more atoms held together by a chemical bond

Front 9

Compound

Back 9

a substance made f two or more elements that are chemically combined at a set ratio

Front 10

Chemical Formula

Back 10

shows the elements in a compound and the ratio of atoms

Front 11

Mixture

Back 11

two or more substances together in the same place but their atoms are not chemically bonded

Front 12

4 ways to separate mixtures

Back 12

distillation

evaporation

filtration

magnetic attraction

Front 13

Distillation

Back 13

Liquids can be separated from each other by heating them up to the temperature at which one of the liquids boils. the liquid boils into a gas. Then the gas cools, forming the separated liquid.

Front 14

Evaporation

Back 14

When left in open air, liquid solutions can change to gas, leaving solid components behind

Front 15

Filtration

Back 15

Solid can be separated from liquids by pouring the mixture through a fiter

Front 16

Magnetic Attraction

Back 16

Iron objects can be separated from a mixture using a magnet

Front 17

Heterogeneous Mixture

Back 17

you can usually see the different parts and they can usually be separated easily

Front 18

Homogeneous Mixture

Back 18

so evenly mixed that you can't see the different parts and it is difficult to separate the parts

Front 19

Weight

Back 19

a measure of the force of gravity on you

Front 20

Mass

Back 20

the amount if of matter in an object

Front 21

International System of Units

Back 21

system used by scientists to measure the properties of matter.

Front 22

Kilogram

Back 22

the SI unit of mass

Front 23

Cubic meter

Back 23

the SI unit if volume

Front 24

Density

Back 24

a measure of the mass of a material in a given volume

Front 25

Density Formula

Back 25

Density = Mass divided by

Volume

Front 26

Physical Change

Back 26

alters the form or appearance of matter but does not turn any substance in the matter into a different substance

Front 27

Physical Change

Back 27

A substance that undergoes a physical change is still the same substance after the change.

Front 28

Chemical Change

Back 28

A change in matter that produces one or more new substances

Front 29

Chemical Change

Back 29

also called a chemical reaction

Front 30

Law of Conservation of Mass

Back 30

Matter is not created or destroyed in any chemical or physical change

(Also called the Law of Conservation of Matter)

Front 31

Temperature

Back 31

measure of how hot or cold something is

Front 32

Thermal Energy

Back 32

the total energy of the motion of all the particles in an object

Front 33

Endothermic Change

Back 33

a change in which energy is absorbed

Front 34

Exothermic Change

Back 34

a change in which energy is released or given off

Front 35

Chemical Energy

Back 35

the energy stored in the chemical bonds between toms