2.2 - ibbriner

2.2 - Water

DCS Topic Code	Statement	Guidance
2.2.U1	Water molecules are polar and hydrogen bonds form between them.
2.2.U2	Hydrogen bonding and dipolarity explain the cohesive, adhesive, thermal and solvent properties of water.	Students should know at least one example of a benefit to living organisms of each property of water. Transparency of water and maximum density at 4°C do not need to be included.
2.2.U3	Substances can be hydrophilic or hydrophobic.
2.2.A1	Comparison of the thermal properties of water with those of methane.	Comparison of the thermal properties of water and methane assists in the understanding of the significance of hydrogen bonding in water.
2.2.A2	Use of water as a coolant in sweat.
2.2.A3	Modes of transport of glucose, amino acids, cholesterol, fats, oxygen and sodium chloride in blood in relation to their solubility in water.

Water exercises