Using the Web as a source of data
We all know
what a wonderful source of information the World Wide Web can be.
Have you ever used it to obtain scientific data in numerical form?
Have you ever analysed that information to test your understanding
of scientific ideas?
the UK, students studying for their GCSE exams in Science have
to complete practical coursework. Students are now encouraged
to use the Web to collect scientific data. They are also expected
to use spreadsheets and other graphical applications to analyse
The three dimensional
graph below is a beautiful illustration of the patterns formed from
the collection of CO2 at different latitudes
over the last twenty years or so. Study the graph carefully.
The picture above was obtained from the 'World
Data Centre for greenhouse gases'
Questions for students.
In the last 20 years, what
has been the general trend of CO2 concentration in
Does the CO2 concentration
always follow this trend or is there a seasonal variation?
What do you think are the reasons for
these seasonal changes? Has it anything to do with
Is there more CO2
in the northern hemisphere or the southern hemisphere?
What do you think the reasons
for this are?
Does this map showing which
areas most contribute to CO2 emissions help?
The map above was obtained from the 'World