Transcript question 1

Living Things Problem Solving. LEVEL F
Click on a question number button :
1
2
3
QUESTION 1
a)
Calculate the average increase in percentage lichen cover per kilometre
between 8 km and 16 km from the industrial site.
b)
Predict the percentage of lichen cover at 30 km from the industrial site.
74
Percentage
lichen cover 50
(%)
Each time you click the mouse a
line will appear on the graph.
Each line should help you to get a
step nearer the answer.
For more help, click on these links:
a
b
Question 1a
Calculate the average increase in percentage lichen cover per kilometre
between 8 km and 16 km from the industrial site.
Percentage lichen cover increases from 50 % to 74 %
between 8 km and 16 km.
Total percentage lichen cover between 8 km and 16 km = ?
Number of kilometres = ?
Now you should be able to work out an average.
Total increase in % lichen cover between
8 km and 16 km
= 74 – 50
= 24 %
Number of kilometres = 16 – 8
= 8 km
Average increase
24
=
8
=3%
Back to previous page
Back to graph
% lichen cover does not change
above 20 km from the site
… at 30 km it will still be 76 %
Back to graph
QUESTION 2
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mouse
for
hints
Answers
Process A is decay.
Process B is the Haber Process.
Process C is nitrogen fixation.
QUESTION 3
CLICK
Part (a): compare these two bars
Part (b): read number value from this bar
Part (c)
Click mouse
for table
headings and
values
Extension
problem
Depth of soil (cm)
Number of bacteria (millions per gram)
Deciduous forest
5
10
15
20
25
1120
980
500
280
60
Sandy meadow
520
400
220
180
80
Question 3: extension
Instead of using two separate bar graphs,
this information could be shown much more
neatly using a single bar graph.
Axes are the same as those in the
question.
Can you see how to draw pairs of bars for
each depth of soil?
You can show which type of soil each bar
refers to by making these bars different
colours and including a key.
Collect some graph paper and try
it!
Click to see what your
graph should look like
A pair of bars might
look like this:
KEY:
Soil from a
deciduous forest
Soil from a
sandy meadow
Number of
bacteria
(millions per
gram)
KEY:
Soil from a
deciduous forest
Soil from a
sandy meadow
1200 1000 -
800 600 400 200 5
10
15
20
Depth of soil (cm)
25