Earth Structure Recap.
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3000°c Outer Core Lithospher e 400°c 5270 km 2900 km 6370 km depth 5000°c Inner Core Mantle Asthenosph ere Earth Structure Recap. Use arrows to locate the labels on the left hand side. Inner Core Crust Outer Core Mantle Core Convect ion Earthqu ake Convect ion Volcano Say which is the odd one out and explain why. Why are the core and mantle of the Earth so hot and how does this heat affect life on the surface of the planet? Key words Radioactive Decay, Convection Currents, Plate tectonics, Earthquakes, Volcanoes, magnetism. …………………….…………………….…………………….………………….…………………….…………………………….. …………………….…………………….…………………….………………….…………………….…………………………….. …………………….…………………….…………………….………………….…………………….…………………………….. …………………….…………………….…………………….………………….…………………….…………………………….. …………………….…………………….…………………….………………….…………………….…………………………….. …………………….…………………….…………………….………………….…………………….…………………………….. …………………….…………………….…………………….………………….…………………….…………………………….. …………………….…………………….…………………….………………….…………………….…………………………….. …………………….…………………….…………………….………………….…………………….…………………………….. …………………….…………………….…………………….………………….…………………….…………………………….. …………………….…………………….…………………….………………….…………………….…………………………….. …………………….…………………….…………………….………………….…………………….…………………………….. Extra info! - Find out who Lord Kelvin was and what he calculated.
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Earth Structure Recap. Use arrows to locate the labels on the left hand side. Say which is the odd one out and explain why. Why are the core and mantle of the Earth so hot and how does this heat affect life on the surface of the planet? - PowerPoint PPT Presentation
Transcript of Earth Structure Recap.
3000°c
Outer Core
Lithosphere
400°c
5270 km
2900 km
6370 km depth
5000°c
Inner Core
Mantle
Asthenosphere
Earth Structure Recap.
Use arrows to locate the labels on the left hand side.
Inner Core Crust Outer Core
Mantle Core Convection
Earthquake Convection Volcano
Say which is the odd one out and explain why.
Why are the core and mantle of the Earth so hot and how does this heat affect life on the surface of the planet?Key words Radioactive Decay, Convection Currents, Plate tectonics, Earthquakes, Volcanoes, magnetism.…………………….…………………….…………………….………………….…………………….……………………………..…………………….…………………….…………………….………………….…………………….……………………………..…………………….…………………….…………………….………………….…………………….……………………………..…………………….…………………….…………………….………………….…………………….……………………………..…………………….…………………….…………………….………………….…………………….……………………………..…………………….…………………….…………………….………………….…………………….……………………………..…………………….…………………….…………………….………………….…………………….……………………………..…………………….…………………….…………………….………………….…………………….……………………………..…………………….…………………….…………………….………………….…………………….……………………………..…………………….…………………….…………………….………………….…………………….……………………………..…………………….…………………….…………………….………………….…………………….……………………………..…………………….…………………….…………………….………………….…………………….……………………………..
Extra info! - Find out who Lord Kelvin was and what he calculated.
Contrasting Crustal Components
• 2.6 grams per cm cubed• Cools under ground slowly from magma
allowing large cristals to grow. • Contains mostly Silica with at least 20%
Quartz.
• 2.9 grams per cm cubed• Cools quickly close to the surface or
as lava erupted from a volcano.• Contains less than 20% Quartz and
large amounts of Magnesium.
A sample of GraniteA sample of Basalt
In your exam you may be asked to CONTRAST geographic features or processes. This means say how they are DIFFERENT.
What words can you use to contrast the two types of crust?However, on the other hand, alternatively, whereasDenser, Darker, more slowly, larger cristals
Exam question (4 marks) Contrast the two types of the Earths crust.
There are two types of Crust, Oceanic and Continental. Continental crust is light with a density 2.6 times that of water, it also has a lot of Silicon. Oceanic crust is called basalt which is a dark rock which has cooled quickly so has small cristals. It has a high density of 2.9 as it has dense minerals in it.
How many marks would you give the answer above and why?
Extension Exam question (8 marks)Describe two different types of the earths crust and explain what happens when they collide and why.
