2.2 - Water
Assessment statements
| 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. |
Lesson
Water exercises
- How many drops of water can you fit on a coin?
- Super-hydrophobic spray
- A drop of water between two slides
Review Lecture
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