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science term 2 Flashcards

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1
Q

What is sedimentation

A

Sedimentation is a method of separating substances
from a liquid. In this process the insoluble substance, which is the substance that does not dissolve in the liquid is allowed to settle at the bottom of the liquid, and separating the clear component of the liquid.

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2
Q

What is decantation

A

This is the process of pouring out the clear liquid left at the top after sedimentation is termed as decantation. The sediment at the bottom ( eg the sand ) is not touched

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3
Q

sieving

A

Sieving separates solids of different sizes ( like rocks and sand )

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4
Q

Filtering

A

Filtering separates solids from liquids. You can use filter paper for this

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5
Q

solution

A

where one mixture mixes into another

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6
Q

solute

A

The stuff that dissolves ( eg sugar into water ) is called the solute

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7
Q

Insolube solutions

A

If it dissolves into a solution its soluble if not it insoluble

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8
Q

dilute solution is

A

A solution with not enough solute ( not enough milo )

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9
Q

concentrated solution

A

A solution with lots of solute ( the perfect milo )

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10
Q

saturated solution

A

A solution with too much solute ( too much milo )

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11
Q

colliod

A

where an insoluble liquid neither settle nor floats but the particiles remain spread out in the liquid

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12
Q

Suspension

A

if the solid altoghether seperates from the liqud it is called suspension. ( like oil and water )

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13
Q

crystallisation

A

when you evaporate the solvent and leave behing the solute

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14
Q

centrifuging

A

Centrifuging separates light and heavy particles by spinning a mixture, usually
inside a test tube. The spinning motion causes the heavier particles to move to
the bottom of the tube.

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15
Q

JUST READ THIS TO ME:
Centrifuging separates light and heavy particles by spinning a mixture, usually
inside a test tube. The spinning motion causes the heavier particles to move to
the bottom of the tube.

A

so cool

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16
Q

distilliation

A

when the solvent evaporates, condenses and then comes out and clear water ( like the acohol coming out of the wine )

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17
Q

chromatography

A

chromotograpghy is the technique used for seperating mixtures based on their solubility

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18
Q

READ THIS TO ME:
As the solvent moves up the paper, it dissolves the components and moves them up the paper. The more soluble a component is, the further up the paper it moves.

A

so cool

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19
Q

Physical property used in filteration

A

particle size

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20
Q

Physical property used in. sedimantation and decantation

A

density

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21
Q

Physical property used in centrifuging

A

density or mass

22
Q

Physical property used in crystallisation

A

boiling point

23
Q

Physical property used in distilliation

A

boiling point

24
Q

Physical property used in chromatography

A

solubility

25
Q

Can averages be decimals

A

no

26
Q

SHOW THAT YOU HAVE CROSSED OUT ANOMALIES

A

so cool

27
Q

Independent variable is on the..

A

x axis

28
Q

dependent variable is on the..

A

y axis

29
Q

Movement in solid, liqud and gas

A

SOlid is vibration, liqud is slow diffusion and gas is fast diffusion

30
Q

Diffusion is

A

high concentration particles moving to low concentration

31
Q

attractive forces solid, liqud and gas

A

solid is stongest, liqud weaker gas weakest

32
Q

JUST READ TO ME
Solid has low energy and the highest kenetic energy and liqud and high

A

so cool

33
Q

volume solid, liqud and gas

A

slid is fixed, liqud fixed, gas not fixed

34
Q

shape solid, liqud and gas

A

solid fixed, take up shape and gas take up shape

35
Q

the process of a solid turning into a gas

A

sublimation

36
Q

the hotter a substance is..

A

the faster the particles move

37
Q

for a solid to melt to a liqud it neeeds to

A

reach its melting point, get enough energy to overcome attractive forces, the particles will move faster and further apart.

38
Q

to convert grams to kg you

A

divide by 1000

39
Q

to covert kg to g you

A

times by 1000

40
Q

to calculate density you

A

divide mass by volume

41
Q

to find out the mass you

A

times density by volume

42
Q

density is

A

amount of mass in a set volume of a substance

43
Q

READ TO ME
Insoluble stuff are colliods and suspension

A
44
Q

if there is a. flat section in the graph that means it either the

A

melting or boiling point

45
Q

the stuff that stays inside the filter paper is…

A

residue

46
Q

the stuff that gets filtered by the filter paper is the

A

filtarate

47
Q

independent variable is..

A

the one you deliberately change at the start

48
Q

dependent variable is

A

the one that you measure

49
Q

ontrolled variable is..

A

the one that you keep the same

50
Q

homogenous mixture

A

a mixture when you can barely tell which element is which

51
Q

hetergenous mixture

A

a mixture with the elements clearly stated

52
Q

to distilliate you need what type of flask

A

a distiation flask

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