lesson 1 to lesson 4

Question 1

it is the simpliest form of matter. cannot be separated.

Answer 1

element

Question 2

it is a form of matter with unique fixed and definite composition

Answer 2

pure substances

Question 3

it is a combination of 2 or more different pure substances

Answer 3

mixture

Question 4

it is a mixture in which the composition is uniform

Answer 4

homogeneous mixture

Question 5

it is a mixture with a non-uniform composition

Answer 5

heterogeneous mixture

Question 6

it is a combination of elements

Answer 6

compound

Question 7

able to be dissolved

Answer 7

soluble

Question 8

incapable of being dissolved

Answer 8

insoluble

Question 9

state of matter that can only be formed in very cold temperatures

Answer 9

bose-einstein condensate

Question 10

is the process by which we can change from one state of matter into another

Answer 10

phase change

Question 11

no definite shape, no definite volume, low density, highly compressible

Answer 11

gas

Question 12

no definite shape, definite volume, mid to high density, slightly compressible

Answer 12

liquid

Question 13

definite shape, definite volume, high density, slightly compressible

Answer 13

solid

Question 14

this state of matter is an ionized gas

Answer 14

plasma

Question 15

gas to solid

Answer 15

deposition

Question 16

solid to gas

Answer 16

sublimation

Question 17

gas to liquid

Answer 17

condensation

Question 18

liquid to gas

Answer 18

evaporation

Question 19

solid to liquid

Answer 19

melting

Question 20

liquid to solid

Answer 20

freezing

Question 21

group of atoms

Answer 21

molecules

Question 22

anything that occupies space and has mass and volume

Answer 22

matter

Question 23

starts with an H

Answer 23

acids

Question 24

ends with OH

Answer 24

base

Question 25

smallest unit of matter

Answer 25

atom

Question 26

atoms have the same number of protons and electrons but different number of neutrons

Answer 26

isotopes

Question 27

a chemical reaction is a rearrangement of atoms

Answer 27

dalton's atomic theory

Question 28

atoms of an element are identical, having the same properties such as mass, size, and chemical properties.

Answer 28

dalton's atomic theory

Question 29

elements are composed of small particles called atom

Answer 29

dalton's atomic theory

Question 30

john dalton

Answer 30

1766-1844

Question 31

matter can neither be created nor destroyed in chemical reactions

Answer 31

law of conservation of mass

Question 32

states that different samples of the same compound will always contain the compound's constituent elements in the same proportion by mass

Answer 32

law of definite composition

Question 33

states that if the two elements can form more than one compound, the ratio of the masses of one of the elements are in fixed ratios of whole numbers

Answer 33

the law of multiple proportions

Question 34

effective method to separate mixtures comprised of two or more pure liquids

Answer 34

distillation

Question 35

it is a technique used to separate out homogeneous mixtures where there is one or more dissolved solid

Answer 35

evaporation

Question 36

it is a separation method used to separate out pure substances in mixtures comprised of particles some in which are large enough in size to be captured in a porous material

Answer 36

filtration

Question 37

some substances are attracted to magnet field and can be pulled from a mixture

Answer 37

magnetism

Question 38

separation by solubility. a solution can be cooled to the point where the solute begin to form crystals and separate from the mixture

Answer 38

crystallization

Question 39

it is a technique used to separate out homogeneous mixtures where there is one or more dissolved solids

Answer 39

evaporation

Question 40

separation of liquids by density and solubility

Answer 40

extraction

Question 41

to arrange into group base on ways that they are alike

Answer 41

classifying

Question 42

two liquids that cannot be combined

Answer 42

immiscible

Question 43

means to remove dirt or debris from a surface and sometimes involves scrubbing or friction in order to remove the debris

Answer 43

cleaning

Question 44

reduces the amount of bacteria on a surface , but does not kill or destroy bacteria

Answer 44

sanitizing

Question 45

kills or inactive both the bacteria and viruses identified on the product's label on the surface

Answer 45

disinfecting

Question 46

three isotopes of hydrogen

Answer 46

protium, deuterium, tritium

Question 47

separation of mixture by passing it in solution or suspension through a medium in which the components move at different rates

Answer 47

chromatography

Question 48

it is a scientific method that can accurately determine the age of organic materials as old as approximately 60,000 years

Answer 48

carbon dating

Question 49

carbon dating of organisms and substances (archeology), research to determine steps in involved in plant photosynthesis

Answer 49

carbon-14

Question 50

used in research involving biology and genetics

Answer 50

phosphorus-32, phosphorus-33

Question 51

protein studies in life science

Answer 51

selenium-75

Question 52

metabolism and bone formation studies

Answer 52

strontium-85

Question 53

used to study life science and drug metabolism

Answer 53

hydrogen -3 or tritium

Question 54

it is the amount of matter an object contains. solid.

Answer 54

mass

Question 55

it is how much space it takes up. liquid.

Answer 55

volume

Question 56

neutrons of carbon-14

Answer 56

**8** 14 (atomic mass) - 6 (atomic number of carbon)

Question 57

elements are composed of small particles called atoms

Answer 57

dalton's atomic theory

Question 58

characteristics that can be observed and measured without changing the identity and composition of the substance

Answer 58

physical property

Question 59

refers to the ability of a substance to undergo changes to transform into a different substance

Answer 59

chemical property