What you learnt... |
The lessons... |
Earthquakes and volcanoes are often in the news. Although scientists understand the Earth's structure, it is still not possible to predict exactly when and where these natural events will happen. You learnt about the theory of plate tectonics and how the Earth's surface has changed over time.
The Earth's crust is a source of valuable raw materials. These include rocks for making concrete, and metal ores for producing steel and other useful metals. You looked at how these materials are extracted and used and the environmental problems they cause. Salt and the air around us are also important sources of useful materials This includes hydrogen from salt solution and nitrogen from air. These substances are used to make ammonia, the raw material for fertilisers, dyes and explosives. You learnt about how chemists choose the conditions needed for industrial chemical processes like making ammonia. You also looked at the benefits and risks of using fertilisers. |
C2.1: The Structure of the Earth
C2.2: Plate Tectonics and Igneous Rocks C2.3: Construction Materials C2.4: Concrete C2.5: Copper C2.6: Alloys C2.7: corrosion C2.8: Making Cars C2.9: Making Ammonia C2.10: Reversible Reactions C2.11: Making Salts 1 C2.12: Making Salts 2 C2.13: Fertilisers and Crop Yields C2.14: Making Fertilisers C2.15: Chemicals form Salt C2.16: Electrolysis of Brine |
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