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bwhs-IPC > semster finals stuff > Flashcards

semster finals stuff Flashcards

1
Q

what are the two branches of science

A

natural and social

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2
Q

what are three types of natural science

A

physical, earth/space, life

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3
Q

what is the scientific method

A

a systematic procedure for collecting/analyzing data

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4
Q

5 steps of scientific method

A
  1. make observations/state the problem
  2. gather information
  3. form hypothesis
  4. test hypothesis
  5. draw conclusions
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5
Q

physical properties

A

DENSITY, color, hardness, melting point, boiling point, electrical conductivity

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6
Q

physical changes

A

melting, freezing, condensing, breaking, crushing

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7
Q

chemical properties

A

solubility, flammeability, radioactivity, acidity

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8
Q

chemical changes

A

burning, corroding, spoiling, cooking

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9
Q

intensive properties

A

does not depend on the size

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10
Q

extensive

A

depends on the size

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11
Q

matter is what two things?

A

substance and a mixture

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12
Q

element

A

a SUBSTANCE that cannot be broken down into smaller substances

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13
Q

compound

A

a combination of elements

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14
Q

homogenous mixture

A

evenly mixed

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15
Q

heterogenous mixture

A

not evenly mixed

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16
Q

solution

A

homogenous, small particles, dont separate

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17
Q

suspension

A

seperates into layers, cloudy

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18
Q

colloids

A

heterogenous, small intermediate particles (fog)

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19
Q

exothermic

A

release of heat

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20
Q

endothermic

A

absorbing heat

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21
Q

calculation for density

A

D = m/v (mass over volume)

22
Q

calculation for pressure

A

P = f/a (pressure = foce/area)

23
Q

mass number

A

protons and neutrons

24
Q

atomic mass

A

protons and neutrons

25
Q

atomic number

A

protons

26
Q

dalton

A

billard ball model, discovered atoms

27
Q

thomson

A

cathode ray tube, discovered electron

28
Q

rutherford

A

gold foil experiment, discovered nucleus

29
Q

bohr

A

bohr model (planetary atom model), discovered valence electron levels

30
Q

chadwick

A

discovered neutrons

31
Q

isotopes

A

same number of protons, different number of neutrons

32
Q

group 1

A

alkali metals

33
Q

group 2

A

alkaline earth metalsg

34
Q

group 3

A

boron family

35
Q

group 4

A

carbon family

36
Q

group 5

A

nitrogen family

37
Q

group 6

A

oxygen family

38
Q

group 7

A

halogens

39
Q

group 8

A

noble gases

40
Q

where are metalloids? what are their properties?

A

stair-steps; ability to conduct heat and temperature varies with temperature

41
Q

where are nonmetals? what are their properties?

A

right side of stairs; nonmetals are poor conductors, gases at rm temp

42
Q

where are metals? what are their properties?

A

left side of stairs; luster, ductile, malleable, conductors, most solids

43
Q

to gain full outer energy level, metals…

A

lose electrons

44
Q

to gain full outer energy levels, nonmetals…

A

gain electrons

45
Q

to gain full outer energy levels, metalloids…

A

share electrons

46
Q

group

A

columns or families, have same number of VE

47
Q

period

A

rows, properties change greatly across period, first element in the period is very reactive metal

48
Q

trends in periodic table

A

atomic size decreases, metallic properties decrease, ability to lose an electron decreases, ability to GAIN an electron increases

49
Q

isotope calculation

A

protons and neutrons

50
Q

ionic bonds

A

share between metals/nonmetals

51
Q

covalent bonds

A

share between nonmetals

bwhs-IPC (11 decks)

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