what’s inside ?
DESCRIPTION
What’s Inside ?. The Earth’s Core – Almost as hot as the surface of the sun (due to radioactive decay) Escape of this inner heat drives geological activity on the planet. Inner Core Under immense pressure Solid metal mostly iron and nickel Very high density 13.5 g/ml. Outer Core - PowerPoint PPT PresentationTRANSCRIPT
What’s Inside?
The Earth’s Core – Almost as hot as the surface of the sun (due to radioactive decay) Escape of this inner heat drives geological activity on the planet.
• Inner Core
• Under immense pressure
• Solid metal mostly iron and nickel
• Very high density 13.5 g/ml • Outer Core
• 2270 km thick
• Liquid metal
• Responsible for Earth’s magnetic field
The Mantle• Lower mantle
• Rocky layer
• Most of earth’s volume
• Upper Mantle
• Hot weak rock that is easily deformed
• 10% is molten
• Consists of the asthenosphere, lithosphere and crust
Asthenosphere: Capable of flow
Lithosphere: rigid solid plates
Oceanic Crust: 5-12 km thick, mostly basalt
Continental Crust: 35 km thick, mostly granite,
Oceanic crust is more dense than continental
Temperature on the surface of the sun ~ 5700˚C
How do we know about the earth’s inner structure?
• Drilling only explores into the top 10-15 km of the crust
• Seismic waves can probe 6400 km though
Examine the paths of earthquake data (the epicenter marks the location of an earthquake)
• State 3 things that you can tell by this diagram
Try to label:Convergent boundaryDivergent boundary(potential) Hawaii
PLATE BOUNDARIES1. Convergent Boundary
• Ocean – Continent• Ocean – Ocean• Continent – Continent
Continent – Continent convergence
Ocean – Continent Convergence
PLATE BOUNDARIES1. Convergent Boundary
• Ocean – Continent• Ocean – Ocean• Continent – Continent
Continent – Continent convergence
Ocean – Continent Convergence List examples of locations for each
2. Divergent Boundary
3. Transform Boundary
Where type of boundary is pictured?