Domain: knowledge and understanding Refer to the for the following: Science Years 7–10 Syllabus 5.7.3e) qualitatively describe reactants and products in the following chemical reactions: iii) precipitation. Students: Students learn to: 1.3a.perform an investigation involving 1. Water is distributed 1.2a.define the terms solute, solvent calculations of the density of water as a and solution on Earth as a solid, liquid and a solid using: liquid and gas 1.2b.identify the importance of water as a solvent 1.3b.analyse information by using models to account for the differing 1.2c.compare the state, percentage and densities of ice and liquid water distribution of water in the biosphere, lithosphere, hydrosphere and 1.3c.plan and perform an investigation atmosphere to identify and describe the effect of anti-freeze or salt on the boiling point 1.2d.outline the significance of the of water 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 2. The wide 2.2a.construct Lewis electron dot 2.3a.process information from distribution and structures of water, ammonia and secondary sources to graph and importance of water hydrogen sulfide to identify the compare the boiling and melting points on Earth is a distribution of electrons of water with other similar sized consequence of its molecules 2.2b.compare the molecular structure of molecular structure 2.3b.identify data and process and hydrogen water, ammonia and hydrogen sulfide, information from secondary sources to bonding the differences in their molecular model the structure of the water shapes and in their melting and boiling molecule and effects of forces between points water molecules 2.2c.describe hydrogen bonding 2.3c.choose equipment and perform between molecules first-hand investigations to demonstrate the following properties of water: 2.2d.identify the water molecule as a surface tension polar molecule viscosity
Domain: knowledge and understanding Refer to the Science Years 7–10 Syllabus for the following: 5.7.3e) qualitatively describe reactants and products in the following chemical reactions: iii) precipitation. Students learn to: Students: 1. Water is distributed on Earth as a solid, liquid and gas 1.2a.define the terms solute, solvent and solution 1.3a.perform an investigation involving calculations of the density of water as a liquid and a solid using: 1.3b.analyse information by using models to account for the differing densities of ice and liquid water 1.3c.plan and perform an investigation to identify and describe the effect of anti-freeze or salt on the boiling point of water 1.2b.identify the importance of water as a solvent 1.2c.compare the state, percentage and distribution of water in the biosphere, lithosphere, hydrosphere and atmosphere 1.2d.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 2. The wide distribution and importance of water on Earth is a consequence of its molecular structure and hydrogen bonding 2.2a.construct Lewis electron dot structures of water, ammonia and hydrogen sulfide to identify the distribution of electrons 2.3a.process information from secondary sources to graph and compare the boiling and melting points of water with other similar sized molecules 2.3b.identify data and process information from secondary sources to model the structure of the water molecule and effects of forces between water molecules 2.3c.choose equipment and perform first-hand investigations to demonstrate the following properties of water: surface tension viscosity 2.2b.compare the molecular structure of water, ammonia and hydrogen sulfide, the differences in their molecular shapes and in their melting and boiling points 2.2c.describe hydrogen bonding between molecules 2.2d.identify the water molecule as a polar molecule