Module 3 | Water
Focus 1: Water is distributed on Earth as a solid, liquid and gas
Lesson 1 | Water on Earth
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Compare the state, percentage and distribution of water in the biosphere, lithosphere, hydrosphere and atmosphere.
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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.
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Identify the importance of water as a solvent.
Lesson 2 | Density of water
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Analyse information by using models to account for the differing densities of ice and liquid water.
Lesson 3 | Effects of solutes on water
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Plan and perform an investigation to identify and describe the effect of anti-freeze or salt on the boiling point of water.
