Chemical elements and water

the world of water by Snap(R) on flickr

Here is the syllabus outline for Topic 3, and also Topics 7 and 8 since they are extensions of Topic 3.  Topic 3,7,8 – syllabus outline

The first section has to do with chemical elements and water.

  • What are the most frequently occurring chemical elements in living things? 
  • Why are calcium, sulfur, phosphorus, sodium and iron needed by plants, animals or prokaryotes?
  • What does a water molecule look like?
  • What are the thermal, cohesive and solvent properties of water?
  • How do these properties relate to water’s use in living organisms as a coolant, medium for metabolic reactions and transport medium?

Try this webquest (thanks Mr Hobbins) to help you cover these points: Water Web quest

This presentation might help, and so might this answer scheme!  Water Web quest MScheme

ToK link:  Some people have claimed that water has memory.  Others say this is pseudoscience.  Do some reading and make up your own minds!

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