science term 2

Question 1

What is sedimentation

Answer 1

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.

Question 2

What is decantation

Answer 2

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

Question 3

sieving

Answer 3

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

Question 4

Filtering

Answer 4

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

Question 5

solution

Answer 5

where one mixture mixes into another

Question 6

solute

Answer 6

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

Question 7

Insolube solutions

Answer 7

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

Question 8

dilute solution is

Answer 8

A solution with not enough solute ( not enough milo )

Question 9

concentrated solution

Answer 9

A solution with lots of solute ( the perfect milo )

Question 10

saturated solution

Answer 10

A solution with too much solute ( too much milo )

Question 11

colliod

Answer 11

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

Question 12

Suspension

Answer 12

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

Question 13

crystallisation

Answer 13

when you evaporate the solvent and leave behing the solute

Question 14

centrifuging

Answer 14

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.

Question 15

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.

Answer 15

so cool

Question 16

distilliation

Answer 16

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

Question 17

chromatography

Answer 17

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

Question 18

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.

Answer 18

so cool

Question 19

Physical property used in filteration

Answer 19

particle size

Question 20

Physical property used in. sedimantation and decantation

Answer 20

density

Question 21

Physical property used in centrifuging

Answer 21

density or mass

Question 22

Physical property used in crystallisation

Answer 22

boiling point

Question 23

Physical property used in distilliation

Answer 23

boiling point

Question 24

Physical property used in chromatography

Answer 24

solubility

Question 25

Can averages be decimals

Answer 25

no

Question 26

SHOW THAT YOU HAVE CROSSED OUT ANOMALIES

Answer 26

so cool

Question 27

Independent variable is on the..

Answer 27

x axis

Question 28

dependent variable is on the..

Answer 28

y axis

Question 29

Movement in solid, liqud and gas

Answer 29

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

Question 30

Diffusion is

Answer 30

high concentration particles moving to low concentration

Question 31

attractive forces solid, liqud and gas

Answer 31

solid is stongest, liqud weaker gas weakest

Question 32

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

Answer 32

so cool

Question 33

volume solid, liqud and gas

Answer 33

slid is fixed, liqud fixed, gas not fixed

Question 34

shape solid, liqud and gas

Answer 34

solid fixed, take up shape and gas take up shape

Question 35

the process of a solid turning into a gas

Answer 35

sublimation

Question 36

the hotter a substance is..

Answer 36

the faster the particles move

Question 37

for a solid to melt to a liqud it neeeds to

Answer 37

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

Question 38

to convert grams to kg you

Answer 38

divide by 1000

Question 39

to covert kg to g you

Answer 39

times by 1000

Question 40

to calculate density you

Answer 40

divide mass by volume

Question 41

to find out the mass you

Answer 41

times density by volume

Question 42

density is

Answer 42

amount of mass in a set volume of a substance

Question 43

READ TO ME Insoluble stuff are colliods and suspension

Question 44

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

Answer 44

melting or boiling point

Question 45

the stuff that stays inside the filter paper is...

Answer 45

residue

Question 46

the stuff that gets filtered by the filter paper is the

Answer 46

filtarate

Question 47

independent variable is..

Answer 47

the one you deliberately change at the start

Question 48

dependent variable is

Answer 48

the one that you measure

Question 49

ontrolled variable is..

Answer 49

the one that you keep the same

Question 50

homogenous mixture

Answer 50

a mixture when you can barely tell which element is which

Question 51

hetergenous mixture

Answer 51

a mixture with the elements clearly stated

Question 52

to distilliate you need what type of flask

Answer 52

a distiation flask