Topic 2 Year 8 chemsitry

Chemistry
Topic		Earth 2
No of lessons		11
When is it happening		Year 8 Term 3
What students will learn		Students should be able to describe the processes that increase and decrease the amount of carbon dioxide in the atmosphere. They should be able to describe the carbon cycle. They should know about how the greenhouse effect works and name some greenhouse gases. They should know how to describe the composition of the Earths atmosphere. They should know the terms global warming, fossil fuels, carbon sink and greenhouse effect. Students should know how to describe the issues associated with extracting limited natural resources from the Earth. They should know that recycling reduces the need to extract resources. They should know that the more a reactive metal, the more difficult it is to separate it from its ore. They should know that carbon displaces less reactive metals, while electrolysis is needed for more reactive metals. They should know the definitions of the terms natural resource, mineral, ore, extraction, recycling and electrolysis.
Key Knowledge that students should know at the end of 'Topic'	This is the knowledge that students will meet for the first time in this topic	Students should be able to label a diagram of the carbon cycle and explain how carbon moves through a cycle on Earth. They will touch upon the word equations for photosynthesis and respiration so they can include that in the carbon cycle. They will know that the atmosphere is mainly made from nitrogen (71%) and oxygen (21%) and the remianing 1% is mainly argon but contains small amounts of carbon dioxide. They will know how process in the carbon cycle are upsetting the balance. They will know the names of three greenhouse gases and why the greenhouse effect is a good thing for life on Earth. They will know what is meant by global warming. They will know what the reactivity series is and how displacement reactions work. They will be able to do simple word equations to demonstrate this. They will learn how metals are extracted from their ores and the different ways this occurs. How is fossil fuel extracted and how it could harm the environment. Looking at alternative energy sources which don't increase global warming.
	This is knowledge that students may have met before but will need to deepen their understanding	From KS2- Rocks contain fossils. The Earth has a crust. From Year 7- The Earth has three layers. Rocks contain fossils which can be used.
Key Skills that students should be able to demonstrate at the end of 'Topic'	This is the skills that students will meet for the first time in this topic	Learning how to label the carbon cycle. Know what the water cycle is. Practical skills carrying out reactions involving the reactivity series. Using the reactivity series to predict a hypothesis. Being able to achieve accurate results and putting them into tables and graphs and then making a conclusion and evaluation from the data. Being able to construct simple word equations from the results in the experiment.
	This is skills that students may have met before but will need to develop	Being able to write simple word equations. Labelling the carbon and water cycle. Knowing the reactivity series and what elements it contains. Fossil fuels are used for power and are non-renewable, they cause global warming when used because they release carbon dioxide
Key vocabulary that students should know and understand		carbon sink, fossil fuels, greenhouse effect, global warming, natural resources, extract, finite resource, recycling, mineral, ore, electrolysis, estimate.
The Big Question		How do human's impact Earths resources?
Key questions that students should be able to answer at the end of the 'Topic'		What is the carbon cycle?
		What do we mean by the greenhouse effect and which gases are involved?
		What happens to the Earth during global warming?
		What elements are in the reactivity series?
		What is the Earth's crust made from?
		What is a metal ore and how can you extract metals from metal ores?
		What is electrolysis and why do we use it?
		Why is it important to reduce waste, recycle and reuse things?
		Is fracking a good idea?