Module 3 | Water
Focus 1: Water is distributed on Earth as a solid, liquid and gas
Lesson 1 | Water on Earth
Compare the state, percentage and distribution of water in the biosphere, lithosphere, hydrosphere and atmosphere.
Outline the significance of the different states of water on Earth in terms of water as:
– a constituent of cells and its role as both a solvent and a raw material in metabolism
– a habitat in which temperature extremes are less than nearby terrestrial habitats
– an agent of weathering of rocks both as liquid and solid
– a natural resource for humans and other organisms
Define the terms solute, solvent and solution.
Identify the importance of water as a solvent.
Lesson 2 | Density of water
Analyse information by using models to account for the differing densities of ice and liquid water.
Lesson 3 | Effects of solutes on water
Plan and perform an investigation to identify and describe the effect of anti-freeze or salt on the boiling point of water.