State that the most frequently occurring chemical elements in living things are carbon, hydrogen, oxygen and nitrogen.
State that a variety of other elements are needed by living organisms, including sulfur, calcium, phosphorus,iron and sodium.
State one role in living organisms each for sulfur, calcium, phosphorus, iron, and sodium.
Draw and label a diagram showing the structure of water molecules to show their polarity and hydrogenbond formation.
Outline the thermal, cohesive and solvent properties of water.
Explain the relationship between the properties of water and its uses in living organisms as a coolant, medium for metabolic reactions and transport medium.
Learning Goals (2 hours)