dynamic planet. can you name the four spheres? how do the four spheres link together? biosphere...
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Dynamic planet
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Can you name the four spheres?
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How do the four spheres link together?
Biosphere
Geosphere
Hydrosphere
Atmosphere
How do humans damage theseSpheres?
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The Geosphere
Carefully complete you own diagram.
Stick the labels on the correct part of the diagram
Use pages 8 – 11 to add extra notes
Extension: what is the difference between the oceanic and continental crust?
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Describe the different layers of earths interior (4)
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What are convectional currents?
• Inside the Earth is hot – over 5000°C
• Inside the earth is called geothermal heat
• This is caused by radioactive decay of elements such as uranium in the core and mantle
Let’s read p10
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Page 8 and 9Continental crust VS Oceanic crust
Crust Type Density Depth Picture
Continental(older 3-4 billon yrs old)
Granite Low 30-50km
Oceanic Basalt high 6-8km
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Describe the differences between the oceanic and continental plate (4)
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Continental drift
Look at the map on p12. Plate tectonics have moved the continents to the positions they are in today
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And now this!!
Label your map and arrow the arrows (page 13)
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Compare the physical features and tectonic hazards of constructive and destructive plate
boundaries (6)
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Key Vocabulary
Focus: the actual point where the earthquake occurred
Epicentre: the point on the earth’s surface directly above the focus
Seismic waves: the shockwaves produced by an earthquake
Seismometer: an instrument that measures vibration in the earth’s crust
The Richter Scale: a scale that measures the magnitude of an earthquake
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Create a mind map explaining why?
The strength ofan earthquake/volcano
The time the event took place
If it is very early in the morning people will be less prepared
They could be asleep Which means there isless reaction time
?
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Why do people live near volcanoes?
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Shield cone volcanoes
• Shield cone volcanoes are wide-based, with gentle slopes. Their lava is runny and thin, which means that it can travel a long way before cooling and solidifying. Often these eruptions are non-violent and can last for years
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Composite Cone Volcanoes
• Composite Cone volcanoes are steep-sided,and made of alternate layers of ash and lava. Often the lava cools to create a plug in the vent, meaning that a huge explosion is needed to remove it.The best example is Mt. St. Helens
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Monitoring Volcanoes
• We CAN predict and prepare for volcanic eruptions…
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Protection Prediction
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What are primary and secondary effects of a Volcano?
Primary effects are…
Secondary effects are….
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Mount Nyiragongo is one of the most active volcanoes in the world
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Mt Skurajima Mt Nyiragongo
Volcano type
Magma type
Explosivity
Hazards
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Using a named example, explain the economic and social impacts of a volcanic eruption (6)