Science

Question 0

Solvent

Answer 0

The substance in which another substance dissolves

Question 1

Saturated soloution

Answer 1

A solution in which no more solute can be dissolved.

Question 2

Solution

Answer 2

The clear mixture formed when one substance is dissolved in another.

Question 3

Sediment

Answer 3

The solid that gathers at the bottom of a liquid

Question 4

Centrifuging

Answer 4

Seperating heavier components by spinning them quickly

Question 5

Decanting

Answer 5

Pour liquid from a mixture leaving the sediment behind

Question 6

Sedimentation + flotation

Answer 6

When water is added to the mix rapture and all heavy materiels sink to the bottom and light materials float on top.

Question 7

Mixtures

Answer 7

Several pure substances combined
Can not be physically separated
Different amounts of each substance can be in the mixture
Like green salad easy to separate

Question 8

Compound

Answer 8

Like a cake when set it is hard to seperate

Question 9

Pure substance

Answer 9

A substance in which there is only one tupe of atom

Question 10

10 dont’s

Answer 10

Do not run in laboratory
Do not eat in laboratory
Do not drink from glassware in laboratory
Do not push or behave roughly in laboratory
Do not look down into a container or point directly at a neighbour
Do not hold flask by neck
Do not mix chemicals at random
Do not smell chemicals directly instead waft smell towards you only do so if told
Do not enter preparation room without teacher permission
Do not put matches or other substances down sink

Question 11

10 do’s

Answer 11

Wear safety goggles
Wear lab coat
Keep workbooks and papers away from heating chemicals or flames
Tie long hair back whenever you use a Bunsen burner
Tell your teacher immediately if you cut or burn yourself
Tie long hair back when heating of mixing substances
Tell you teacher immediately if you break any glassware of spill chemicals
Wash your hands after experiments
Listen and follow teacher instructions
Light Bunsen burner with matches never with paper or other materials
Wear gloves when your teacher instructed you to

Question 12

Lighting a Bunsen burner process

Answer 12

1)place Bunsen burner on safety mat
2)make sure gas is off (in line with tap)
3)connect gas hose to tap
4)close air hole
5)light match
6)turn on gas (hold over Bunsen burner while doing this)
If instructed turn in to blue flame

Question 13

Which flame is which?

Answer 13

Orange: safety flame
Blue:heated

Question 14

Which part of flame is hottest?

Answer 14

The very tip of inside or bottom of outside flame

Question 15

Parts of a Bunsen burner

Answer 15

Bottom:base
Above:collar
Inside collar: air hole
Above collar: barrel
Cord connecting Bunsen burner and gas: gas hose

Question 16

Questions

Answer 16

Simple questions: questions you can answer briefly
e.g.what colour is the wall
Big question: a question that need to be researched to answer

Question 17

Process of writing a report

Answer 17

Title
Abstract
Intro 
method
Results
Discussion 
References
Appendices

Question 18

What is an independent variable?

Answer 18

The factors that change

Question 19

What is a dependent variable?

Answer 19

The thing that changes depending on the independent variable

Question 20

What is a controlled variable?

Answer 20

A controlled variable is something that stays the same through the experiment

Question 21

Thermometer -meniscus reading

Answer 21

If the bump is facing up read from top of bump

If bump is facing down read from bottom of bump

Question 22

Chromatography

Answer 22

Used to separate two dyes from one another
The chromatography paper is drawn onto with texta or some type do dye
The paper tip is put into water
This causes the dyes to travel up the chromatography paper the more soluble moves further than the less soluble
This separates the dyes from each other

Question 23

Distillation

Answer 23

Used to seperation and collect liquid from a solution of a soluble solid
The solution is heated in a flask until the liquid boils then the vapour passes into a condenser where if is fooled and condensed to a liquid
The pure liquid is then collected in a beaker.

Question 24

Evaporation

Answer 24

Used to separate a soluble solid from a liquid

A solution is heated up eventually the liquid will evaporate leaving the solid behind

Question 25

Fractional distillation

Answer 25

Type of distillation used to seperate mixtures of liquids
Different liquids boil at different temperatures, when heated they boil and condensed at different times the apparatus has a fractioning column, this ensures that only the liquid boils at its boiling point will pass into the condenser

Question 26

Filtiration

Answer 26

Seperates insoluble solids from liquids

The solid stays on god filter paper an the liquid passes through into the beaker

Question 27

Magnetic seperation

Answer 27

When there are magnetically susceptible objects in a mixture. A magnet is held on top and all magnetic objects are attracted to the magnet therefore the magnetic objects have separated from the rest if the mixture

Question 28

Sedimentation and flotation

Answer 28

When water is added to a mixture all heavy materials sink to the bottom and light materials float on top.