King Charles I School Knowledge Organiser
Welcome to SCIENCE autumn 1
Using Bunsen burners
Safety in the Lab
Symbols are used to show is a chemical is hazardous.
Symbols are simple and easily seen, also the same symbol is
used worldwide so the language doesn’t matter. These
symbols may be in a triangle or a square, and a chemical
container might be labelled with more than one hazard
symbol.
Bunsen burners need to be handled carefully. The gas pipe should
be attached to the gas supply. The air hole (collar) should be
closed. You should carefully but quickly turn on the gas supply
and light the Bunsen.
Yellow flame – safety flame – closed collar
Blue flame – roaring flame for heating – open collar
Safety: Hair tied back, ties tucked into shirts, always use a gauze if using a tripod
Predicting and planning
Corrosive
Irritant
Toxic
Harmful Flammable
Lab Apparatus
We draw laboratory apparatus using scientific drawings.
These a simple not artistic drawings. Drawings should be
done using a pencil. The label lines should be drawn using a
ruler and should mostly be horizontal. It is easier to draw a
diagram in method to help another person understand how
to set up the equipment used. Common equipment 
tripod, conical
flask, measuring
cylinder,
thermometer,
beaker, gauze,
Bunsen burner,
evaporating basin,
bench mat, test
tube, clamp stand,
funnel, test tube
rack
Give scientific reasons for a prediction. A good method is simple with all the information needed
to complete the practical (including measurements and equipment needed).
Variables – in a fair test only the independent variable should be changed:
Independent (I change), Dependent (I measure),
Control variables (I keep the same)
Methods should provide precision of equipment (e.g. why would you use a measuring cylinder to
measure the amount of a solution?), be repeatable and reproducible to give valid results.
Data Collection
Graphs
The independent variable should be the
first column in a table. Tables should be
draw with ruler and a pencil. Headings and
units should be at the top of each column.
You should use the same number of
decimal places.
Mass
(g)
0.0
Time for reaction
to complete (s)
56
52
58
Average
time(s)
55.3
Bar charts are drawn where the data is
discrete (e.g. names, category, colour).
Line graphs are drawn when data is
continuous (e.g. height vs weight).
Rules for graphs –
Pencil and ruler, title, the scale should
go up the same (e.g. 0,2,4,6,8,10), small
X points for line graphs, axis labels and
units, use all of paper, add a line of
best fit.