dynamic planet. can you name the four spheres? how do the four spheres link together? biosphere...
TRANSCRIPT
Dynamic planet
Can you name the four spheres?
How do the four spheres link together?
Biosphere
Geosphere
Hydrosphere
Atmosphere
How do humans damage theseSpheres?
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?
Describe the different layers of earths interior (4)
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
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
Describe the differences between the oceanic and continental plate (4)
Continental drift
Look at the map on p12. Plate tectonics have moved the continents to the positions they are in today
And now this!!
Label your map and arrow the arrows (page 13)
Compare the physical features and tectonic hazards of constructive and destructive plate
boundaries (6)
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
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
?
Why do people live near volcanoes?
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
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
Monitoring Volcanoes
• We CAN predict and prepare for volcanic eruptions…
Protection Prediction
What are primary and secondary effects of a Volcano?
Primary effects are…
Secondary effects are….
Mount Nyiragongo is one of the most active volcanoes in the world
clip
Mt Skurajima Mt Nyiragongo
Volcano type
Magma type
Explosivity
Hazards
Using a named example, explain the economic and social impacts of a volcanic eruption (6)