Brainscape's Knowledge GenomeTM

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


See full index

N LVLS SUCK > SCIENCE SUMMARY > Flashcards

SCIENCE SUMMARY Flashcards

1
Q
  1. What apparatus(s) uses accurately/ exactly?
A

pipette & burette

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q
  1. What apparatus(s) uses approximately/ nearest?
A

measuring cylinder & beaker

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q
  1. What is pipette rounded to?
A

(1dp): eg. 25.0cm(3)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q
  1. What is burette rounded to?
A

(2dp): eg. 25.00cm(3)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q
  1. What is measuring cylinder rounded to?
A

nearest cm(3)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q
  1. What is beaker rounded to?
A

approximate volume of 100cm(3) or 250cm(3).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q
  1. If gas is stated, what apparatus is used?
A

gas syringe.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q
  1. What apparatus is used to find mass?
A

mass balance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q
  1. What is definition of denser?
A

heavier than oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q
  1. What delivery is used for denser?
A

downward delivery.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q
  1. What is the definition of less dense?
A

lighter than oxygen.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q
  1. What delivery is used for less dense?
A

upward delivery.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q
  1. What is considered a pure substance?
A

element/ compound.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q
  1. State the features of a pure substance
A
  • has fixed bp & mp.
  • chromatography: 1 spot.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q
  1. State the features of an impure/ mixture
A
  • melts below mp/ over a range of temps.
  • boils above bp/ over a range of temps.
  • chromatography: >1 spot.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q
  1. State the purification analysis methods
A
  • filtration.
  • crystallization/ evaporation.
  • simple distillation.
  • fractional distillation.
  • chromatography.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q
  1. What is the filtration technique?
A

separate insoluble from mixture.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q
  1. What is the crystallization/ evaporation technique?
A

separate soluble solid from mixture.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q
  1. What is the simple distillation technique?
A

separate liquid solvent from a mixture.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q
  1. What is the fractional distillation technique?
A

separate miscible liquids from different boiling points.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q
  1. Name all prefixes and their SI units
A
  • Terameter: 10(12)m
  • Gigameter: 10(9)m
  • Megakelvin: 10(6)K
  • Kilometer: 10(3)m
  • centimeter: 10(-2)m
  • millisecond: 10(-3)s
  • microsecond: 10(-6)s
  • nanosecond: 10(-9)s
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q
  1. What are the four types of object measurements?
A
  • size of an atom.
  • size of a hair.
  • size of radius of earth.
  • size of diameter of earth.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q
  1. What are the object measurements?
A
  • size of an atom: 10(-10)m
  • size of a hair: 10(-4)m
  • size of radius of earth: 10(6)m
  • size of diameter of earth: 10(7)m
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q
  1. Name the base units and their SI units
A
  • electric current: ampere(A)
  • temperature: kelvin(K)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q
  1. What are the instruments used to measure length and what are they used for?
A
  • measuring ruler: height.
  • digital calipers: diameter of bigger objects, eg. test tubes.
  • micrometer screw gauge: diameter of smaller objects, eg. piece of thin wire.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q
  1. What is a period?
A

period = time for one oscillation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q
  1. State an example of a period
A

R->S->T->S->R

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q
  1. What causes a longer period?
A
  • longer period length.
  • greater gravitational field strength.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q
  1. What is a scalar quantity?
A

has magnitude only

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q
  1. What is a vector quantity?
A

has magnitude & direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q
  1. What is distance?
A

the total length travelled.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q
  1. What is displacement?
A

the shortest distance between the start & end point.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q
  1. What is the SI unit for distance & displacement?
A

m

34
Q
  1. What is the SI unit for speed & velocity?
A

m/s

35
Q
  1. Formula for speed
A

distance/time

36
Q
  1. Formula for velocity
A

displacement/time

37
Q
  1. How to answer ticker tape question?
A

the object is moving at (constant/ increasing. decreasing) speed.

38
Q
  1. SI unit for ticker tapes
A

s

39
Q
  1. Formula for total time of ticker tape?
A

total time= seconds x no. of ticks.

first tick is not counted as t=0

40
Q
  1. What is acceleration?
A

the rate of change in speed/ velocity in one second.

41
Q
  1. SI unit for acceleration
A

m/s(2)

42
Q
  1. Formula for acceleration
A

final speed-initial speed/time

43
Q
  1. How to write deacceleration answer?
A

dont write ‘-‘ in the answer even though its a negative number but instead write ‘deaccelerates’ instead of ‘accelerates’.

44
Q
  1. What is the SI unit for average speed?
A

m/s

45
Q
  1. Formula for average speed?
A

total distance/total time

46
Q
  1. SI unit of distance time graph
A

m/s

47
Q
  1. Formula for distance time graph
A

distance/time

48
Q
  1. distance time graph:
    - steep=???
    - less steep=???
A
  • steep= increasing velocity.
  • less steep= decreasing velocity.
49
Q
  1. SI unit of speed time graph
A

m/s(2)

50
Q
  1. How to calculate distance for speed time graph?
A

calculate the bottom area of the graph.

51
Q
  1. How to calculate the bottom area of speed time graph if the bottom area is a triangle?
A

area of triangle= 1/2 x b x h.

52
Q
  1. How to calculate the bottom area of speed time graph if the bottom area is a rectangle/square?
A

area of rectangle/square= b x h.

52
Q
  1. speed time graph:
    - steep=???
    - less steep=???
A
  • steep= increasing acceleration.
  • less steep= decreasing acceleration.
53
Q
  1. Do you need to calculate the speed in distance time graph?
A

no.

54
Q
  1. How much is the acceleration in a vacuum?
A

10m/s(2)

55
Q
  1. What is free fall?
A

a vacuum.

55
Q
  1. If air resistance can be ignored on earth, how much is the acceleration?
A

10m/s(2)

56
Q
  1. What is the change of state from solid to gas called?
A

sublimation

57
Q
  1. What are the features of solids? (eg. arrangement, movement, forces, kinetic energy.)
A

-arrangement: particles are packed very closely together in an orderly arrangement.
- movement: particles vibrate about a fixed position and are not free to move.
- forces: particles are held together by strong forces.
- ke of particles: low.

58
Q
  1. What are the features of liquids? (arrangement, movement, forces, kinetic energy.)
A
  • arrangement: particles are packed close together but not in an orderly arrangement.
  • movement: particles are able to slide over each other and move throughout the liquid.
  • forces: particles are held together with weaker forces.
  • ke of particles: higher.
59
Q
  1. What are the features of gases? (arrangement, movement, forces, kinetic energy.)
A
  • arrangement: particles are far apart in a random arrangement.
  • movement: particles are free to move throughout the container or the space that the gas occupies.
  • forces: force between particles is very weak or negligible.
  • ke of particles: highest.
60
Q
  1. Draw the heating curve and label the table
A

in diagram

61
Q
  1. Draw the cooling curve and label the table
A

in diagram

62
Q
  1. Describe what happens during melting or boiling
A

temperature remains constant during melting or boiling as the energy is being absorbed.

63
Q
  1. Describe what happens during condensation or freezing
A

temperature remains constant during condensation and freezing as energy is being released.

64
Q
  1. What is the atomic structure for proton?
A
  • relative charge: +1
  • relative mass: 1
  • position: in the nucleus
65
Q
  1. What is the atomic structure for neutron?
A
  • relative charge: 0
  • relative mass: 1
  • position: in the nucleus
66
Q
  1. What is the atomic structure for electron?
A
  • relative charge: -1
  • relative mass: 1/1840 = 0
  • position: in electron shells
67
Q
  1. What are the periodic table definitions?
A
  • proton (atomic) number.
  • nucleon (mass) number.
  • isotopes.
67
Q
  1. What is the definition of a proton (atomic) number?
A

the number of protons in the nucleus of an atom.

neutral atom: proton=electron

68
Q
  1. What is the definition of a nucleon (mass) number
A

the number of neutrons and protons in the nucleus of an atom.

neutral atom: proton=electron

69
Q
  1. How to find the number of atoms?
A

nucleon (mass) no. - proton (atomic) number.

70
Q
  1. State the definition of isotopes
A

atoms of the same element with the same number of protons but different number of neutrons.

71
Q
  1. What is the meaning of a group in the periodic table?
A

atoms of elements in the same group with the same number of valence electrons

72
Q
  1. Is a group vertical or horizontal?
A

vertical (⏐).

73
Q
  1. Is a period horizontal or vertical?
A

horizontal (━).

74
Q
  1. What is the meaning of a period in the periodic table?
A

atoms of elements in the same period with the same number of electron shells

75
Q
  1. State the definition of positive ions
A

atoms of metals (Grp 1-13) that lose electrons to form positively charged ions to achieve a stable electronic configuration.

76
Q
  1. Will there be more protons or electrons after forming positively charged ions?
A

no. of protons > no. of electrons

the no. of protons will never be equal to the no. of electrons.

77
Q
  1. State the definition of negative ions
A

atoms of non metals (Grp 15-17) gain electrons to form negatively charged ions to achieve a stable electronic configuration.

78
Q
  1. Will there be more protons or electrons after forming positively charged ions?
A

no. of protons < no. of electrons

the no. of protons will never be equal to the no. of electrons.

79
Q
  1. Does grp 18 elements lose or gain electrons?
A

grp 18 elements are chemically unreactive so they wont lose or gain electrons as their atoms already have a stable electronic configuration.

N LVLS SUCK (8 decks)

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