How are
people changing
the climate?

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1. Man-made climate change?

Worksheet 2

1. Read the tell-tale map!

a) Look at the diagram - it shows temperature changes during the last 100 years on different areas of the globe.

In which areas has the temperature increased the most? Are there places where the temperature has decreased?  Which consequences might the changes have for people who live in the areas with the greatest increase or decrease?  Why do you think there are areas on the map without symbols – is it because the temperature is unchanged here, or may there be other reasons? 

b) Look at this diagram - it shows precipitation (rain and snow) changes during the last 100 years in different areas of the globe.

Where has precipitation increased the most? Where has it decreased the most?  Were these places particularly wet or dry before the change? What connections can you see between this map and the map in a? What consequences do you think the changes may have in the most affected places?

2. Experiment: Gases dissolved in water

Pour soda water in two test tubes. Put one in a hot bath (hot tap water) and the other in a cold bath. Watch what happens in each of the tubes.

Can you explain what you observe? Can you use your observations to explain what will happen to the CO₂ dissolved in sea water if the sea warms up?

Authors: Ellen K. Henriksen and Camilla Schreiner - University of Oslo - Norway. Scientific reviewer: Andreas Tjernshaugen - CICERO (Center for International Climate and Environmental Research - Oslo) - Norway - 2004-01-20 Educational reviewer: Educational reviewer: Nina Arnesen - Marienlyst school in Oslo - Norway - 2004-03-10. Last update: 2004-03-27.