Introduction

  -using this resource

Global warming

  -the facts

  -case study

  -hot map

  -CO calculator

  -pledge guest book

Activities

  -lesson activities

  -data analysis

  -data logging

  -quiz

Resources

  -links page

 


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?

In 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 data.

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.

  1. In the last 20 years, what has been the general trend of CO2 concentration in the atmosphere?

  2. Does the CO2 concentration always follow this trend or is there a seasonal variation?

  3. What do you think are the reasons for these seasonal changes? Has it anything to do with photosynthesis?


  4. Is there more CO2 in the northern hemisphere or the southern hemisphere?

  5. What do you think the reasons for this are?

  6. Does this map showing which areas most contribute to CO2 emissions help?

The map above was obtained from the 'World Resources Institute'

 

If you are making an investigation into global warming using data from the world wide web, a good starting place is 'Earthtrends'   earthtrends.wri.org