geothermal power 8 september, 2015 objectives be able to describe how electricity can be produced by...
TRANSCRIPT
Geothermal Power
19 April 2023
Objectives
Be able to describe how electricity can be produced by Geothermal power and evaluate the advantages and
disadvantages.HSW: AF2: Make balanced judgments about scientific developments by
evaluating the economic, moral, social or cultural implications. Used before in: Fossil Fuels Lesson Will use again in: Next lesson – how do
power stations effect us?
PLTS: Independent enquirers: support conclusions, using reasoned arguments and evidence.
Used before in: Nuclear Power Lesson Will use again in: Next lesson – how do power stations effect us?
KeywordsGeo, thermal, crust, steam vent, geyser,
magma, molten, radioactive, turbine,
generator.
HW – in planner pleaseQuestion Sheet has been
emailed to you. Please complete for next Friday 18th
Outcomes
All students should be able to: Use keywords to draw a labeled diagram
that helps describe how electricity can be produced from geothermal energy in the crust.
Most students should be able to: Describe the advantages and
disadvantages of geothermal energy.Some students should be able to: Use their understanding to evaluate the
pros and cons of building a geothermal power plant in a specific place.
Starter – What causes Geysers?
• Watch the clip:• http://www.youtube.com/watch?v=W
-daow-LojM&feature=related
• Think – Pair - Share• Describe what is happening.• Explain why you think this is
happening – come up with a theory.
Watch: Geothermal Power clip here
Pros and cons of geothermal energy
Extension: For each one explain why it is a good or bad thing.
Should Africa Use Geothermal Energy?• TASK: Make an information leaflet to explain Geothermal Power stations to
worried local people• Copy the diagram of a Geothermal power station from figure 5 on page 271
onto the blank piece of paper and explain how it produces electricity (it will be part of your leaflet).
• Use the Keywords below to explain what Geothermal energy is and how Electricity can be produced from it:
• In your explanation you should explain the meaning of the term Geothermal. • Where the energy comes from. • How we tap into this energy.• And how we transform it into electricity.• Answer all of the questions in the speech bubbles • Extension: describe the energy transfers/ transformations involved in the
process.Electricity Turbine Magma Earth Heat
Rocks Steam Generator Radioactive
You have 15 Minutes!
Self assessment – grade and comment
Have you completed: A labeled diagram of a geothermal power
station?A description of how electricity can be
produced from geothermal energy?Can you: Give examples of advantages and
disadvantages of geothermal energy?Did you: Answer all the questions from the speech
bubbles and explained energy transformations?
Should Africa Use Geothermal Energy?• TASK: Make an information leaflet to explain Geothermal Power stations to
worried local people• Copy the diagram of a Geothermal power station from figure 5 on page 271
onto the blank piece of paper and explain how it produces electricity (it will be part of your leaflet).
• Use the Keywords below to explain what Geothermal energy is and how Electricity can be produced from it:
• In your explanation you should explain the meaning of the term Geothermal. • Where the energy comes from. • How we tap into this energy.• And how we transform it into electricity.• Answer all of the questions in the speech bubbles • Extension: describe the energy transfers/ transformations involved in the
process.Electricity Turbine Magma Earth Heat
Rocks Steam Generator Radioactive
You have 15 Minutes!
Geothermal
• 1) This is the kind of thing I expect:• Geo means ……………………. Thermal means
……………. This thermal energy comes from the decay of ………….. elements, such as uranium, in ................ under the ground. The heat released warms the surrounding ……… and can turn nearby water into …………. Steam turns a ………… which drives a …………… that produces ………….
Electricity Turbine Magma Earth Heat Rocks Steam Generator Radioactive
Hot Rocks – Heat energyWater to Steam – Heat energy
Steam to turbine – Kinetic energyTurbine to Generator – Kinetic energy
Generator – Electrical energy
Possible Answers
Will it be dangerous? • It shouldn’t be – no more dangerous than the active volcano
nearby. That could erupt at any time. But you obviously have to keep the steam you bring up under control.
How will it benefit my family? • The drilling, and making the power station, are expensive. But
then the steam that powers the generators is free. So the electricity will be cheap. It may also provide jobs.
Will it pollute the atmosphere? • No: the main gas produced is steam.Will the supply be reliable? • Very reliable – the hot rock is always there. The water is recycled,
so we won’t have power cuts every time there’s a drought. Will it affect wildlife? • It’s unlikely to affect wildlife because the power station is quite
small. The animals won’t take any notice of it.Will it put off tourists who come here on Safari? • Possibly – but the power station will only take up a small area, so
we don’t need to worry about them spoiling the view.
Self assessment – grade and comment
Example of what you will write:
Grade: A What Went Well• I drew a neat diagram of a geothermal power station and labelled it correctly.• I described how electricity is made.• I know examples of the advantages and disadvantages • I answered most of the questions correctly.Even Better If• I could have got an A* by thinking how the power station will effect wildlife and tourism in the area.
Self assessment – grade and comment
Have you completed: A labeled diagram of a geothermal power
station?A description of how electricity can be
produced from geothermal energy?Can you: Give examples of advantages and
disadvantages of geothermal energy?Did you: Answer all the questions from the speech
bubbles and explained energy transformations?
Write a Comment: WWW and EBI
Heat Iron Geothermal Reliable
Water Crust GeneratorMolten Rocks
Electricity5000
degreesEarth Fuel
Carbon Dioxide
Radioactive Set up cost Steam