Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science 8 > Chemistry > Flashcards

Chemistry Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Length is measured in…

A

meters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Length is measured with…

A

ruler/meter stick

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

mass is measured in…

A

grams

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

mass is measured with…

A

triple beam balance or electronic balence

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

time is measured in…

A

seconds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

temperature is measured in…

A

degrees celsius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

uniform solid volume is measured with…

A

LxWxH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

solid volume unit of measurement?

A

cm^2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

not uniform solid volume is measured with…

A

water displacement in a graduated cylander

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

liquid volume unit of measuremet

A

ML

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is volume?

A

the amount of space an object takes up

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

define scientific method

A

a organized set of investigation procedures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Define hypothosis

A

educated guess

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

define experiment

A

procedure for testing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what is a control group

A

standard for comparing (normal)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

define constant

A

factor that does not vary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what is an independent variable

A

changed by the experimentor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what axis is the independent variable on

A

x axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

dependent variable

A

changes based on independent variable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Qualitative experiment

A

quality

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

quantitative experiment

A

amount

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

define graph

A

a visual display of information or data

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

line graph

A

changes over time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

bar graph

A

comparing information

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

circle graph

A

shows fixed quantity broken down into parts (percents)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

define density

A

how closely packed the molecules are in a substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

density formula

A

m/v

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

density units

A

g/cm³
g/mL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

define physical property

A

characteristic of a material that you can observe without changing the substance (color, size, shape)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

chemical property

A

characteristic of a substance that indicates whether it can undergo a certain chemical change (flammable, combustible)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

physical change

A

a change in size, shape, or state of matter, but does not change identity (melting ice, cutting paper, breaking glass)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

chemical change

A

a change from one substance to another (fireworks exploding, rusting metal)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

law of conservation of mass

A

says that the mass of all substances present before a chemical change equals mass of all substances after the change

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

precipitate

A

a solid formed from a liquid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

endothermic reaction

A

reaction in which heat is absorbed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

exothermic reaction

A

reaction in which heat is given off

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

melting

A

from solid to liquid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

melting point of water

A

0 degrees celcius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

freezing point of water

A

0 degrees celcius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

freezing

A

from liquid to solid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

vaporization

A

from liquid to gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

vaporization point

A

100 degrees celcius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

evaporation

A

occurs at the surface of a liquid without heating it (liquid to gas)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

condensation

A

gas to liquid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

condensation point

A

100 degrees celcius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

sublimation

A

from a solid to a gas with no liquid phase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

does tempurature change during a phase change?

A

no

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

what axis is thermal energy on in a phase change graph

A

x axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

what axis is tempurature on in a phase change graph

A

y axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

describe molecules in a solid

A

densely packed and vibrating

51
Q

describe molecules in a liquid

A

loosely packed and moving around

52
Q

describe molecules in a gas

A

spread out and moving around

53
Q

how does a liquid take shape

A

the container it is in

54
Q

describe element

A

matter that is composed of one type of atom

55
Q

what is this called:
Au

A

chemical symbol

56
Q

define atom

A

smallest piece of matter

57
Q

what charge to protons have

A

positive

58
Q

where are protons in an atom

A

in the nucleus

59
Q

what charge to neutrons have

A

nutural or no charge

60
Q

where is a neutron in an atom

A

in the nucleus

61
Q

what charge to electrons have

A

negative

62
Q

where are electrons in the atom

A

orbiting the nucleus

63
Q

where is the nucleus

A

the center of the atom

64
Q

electron cloud

A

shows electrons traveling around the nuclues

65
Q

electrons closer to the nucleus have ___ energy

A

low

66
Q

electrons further away from the nucleus have ___ energy

A

high

67
Q

how do you calculate mass of an atom

A

protons + nuetrons

68
Q

where is mass

A

in the nucleus

69
Q

atomic number

A

number of protons in an atom

70
Q

how do you calculate the number or neutrons

A

mass-protons

71
Q

isotopes

A

atoms of the same element that have a different number of nuetrons

72
Q

what electrons are shown in a lewis structure

A

valence electrons

73
Q

what are valence electrons

A

the electrons on the outer ring

74
Q

how do you easily find the number of valence electrons on a periodic table

A

the ones place of the group number

75
Q

metals

A

most frequent on the periodic table

76
Q

metals charecteristics

A

good conducters of thermal energy
are malleable
are ductile
are shiny
have few electrons on the outer level
all but mercury are solid at room tempurature

77
Q

nonmetals

A

right hand side of the periodic table

78
Q

non metals charecteristics

A

poor conducters of thermal energy
no shiny
not mallieble or ductile
more than half are gasses at room tempurature

79
Q

what is malleable

A

can be hammered into sheets

80
Q

what is ductile

A

drawn into wires

81
Q

metelloids

A

the staircase on the periodic table

82
Q

which two types of elements share proporties with meteloids

A

metalss and non metals

83
Q

have about half a complete set in their valence electrons

A

metalloids

84
Q

what is another name for rows

A

periods

85
Q

which way do rows go

A

left to right

86
Q

as elements go from left to right, they become ___ reactive

A

less

87
Q

what are columns also known as

A

groups

88
Q

which way to columns go

A

up and down

89
Q

how many groups are there

A

18

90
Q

what do groups have in common

A

similar physical and chemical proporties
have the same number of valence electrons

91
Q

which groups are highly reactive

A

1, 2, 17

92
Q

what is group one known as

A

alkali metals

93
Q

what is group 2 known as

A

alkaline earth metals

94
Q

what is group 17 known as

A

halogens

95
Q

what is group 18 known as

A

nobel gasses

96
Q

are nobel gasses reactive

A

no

97
Q

nobel gasses energy level is___

A

full

98
Q

groups 3-12 are known as

A

transition metals

99
Q

what is an acid

A

substance that produces hydrogen ions in a solution ((H+)

100
Q

what are the 4 proporties of acids

A

sour
electrolytes (can conduct electricity
corrosive
react with indicators

101
Q

what is a base

A

a substance the produces hydroxide ions in a solution (OH) but also accept H+

102
Q

what are the 5 proporties of bases

A

crytalline solid
slippery
biitter
corrosive
react with inticators

103
Q

indicator definition

A

changes color in the presence of acid or base

104
Q

give an example of an indicaor

A

ph paper
litmus paper

105
Q

neutralization definition

A

chemical reaction between an acid and a base in a water solution which results in formation of salt and water

106
Q

salt

A

compound formed when negative ions of an acid combine with positive ions from a base

107
Q

strong acid

A

ionizes almost completely in water

108
Q

weak acid

A

only partly ionizes in a solition

109
Q

strong base

A

dissociated completely in a solution

110
Q

weak base

A

does not completely dissociate in a solition

111
Q

what is ph

A

a measure of concentration of H+ ions in a solution or how acidic or basic it is

112
Q

what is the ph scale range

A

0-14

113
Q

what number is neutral on a ph scale

A

7

114
Q

what numbers are acids on a ph scale

A

0-6

115
Q

what numbers are bases on aa ph scale

A

8-14

116
Q

what color does pink litmus paper turn in a base

A

blue

117
Q

define substance

A

type of matter with a fixes composition that can not be seperated by physical means

118
Q

define element

A

substance made up of atoms with same identity

119
Q

give an example of an element

A

gold, helium, aluminum

120
Q

define compound

A

atoms of two or more elements combined

121
Q

give an example of a compound

A

water, air

122
Q

define mixture

A

material made up of two or more substances that can be seperated by physical means

123
Q

define heterogeneous mixture

A

mixture in which different materials can be easily distinguished

124
Q

define homogeneous mixtures

A

mixture in which two or more substances are uniformly spread out

Science 8 (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions