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3.1 Chemical elements and water [2h]
SYLLABUS OVERVIEWMEN

3.1.2 State that a variety of other elements are needed by living organisms, including sulfur, calcium, phosphorus, iron and sodium.  

3.1.3 State one role for each of the elements mentioned in 3.1.2.
Refer to the roles in plants, animals and prokaryotes.

3.1.5 Outline the thermal, cohesive and solvent properties of water.

Aim 7:
Data logging could be carried out to compare the thermal properties of water with those of other liquids. TOK: Claims about the “memory of water” have been categorized as pseudoscientific. By what criteria can a claim be judged to be pseudoscientific?

Drawing pdf.
3.1 Chemical elements and water [2h]

3.1.1 State that the most frequently occurring chemical elements in living things are carbon, hydrogen, oxygen and nitrogen.
3.1.4 Draw and label a diagram showing the structure of water molecules to show their polarity and hydrogen bond formation.
3.1.6 Explain the relationship between the properties of water and its uses in living organisms as a coolant, medium for metabolic reactions and transport medium. Limit the properties to those outlined in 3.1.5.