Posts Tagged ‘chemical elements’

Chemical elements and water

Wednesday, September 22nd, 2010

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!