The Earth as a planet. Chapter 6. Earth as a Planet. - 4.6 billion years old Compared to other planets in the solar system Concepts of Living, Active and “dead” planets The Earth as a Living Planet, Our moon as a dead planet Shape and size – contributes to a living planet. A DEAD PLANET.
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The Earth as a planet
A DEAD PLANET
On the surface Venus may look like this.
Sulfuric acid spews from volcanic activity giving the atmosphere a yellow tinge.
Imence acid lighting storms erupt throughout the surface of the planet.
Our earth in all it’s majesty has supported life for at least 3 billion years
Alien planets may look different then ours. But if there is some form
Of life it makes it a living planet.
Jupiter's Moon Ganymede man have some form of life under the ice wher
There is a good chance of water.
Heavy metals, Iron
Less Dense Materials
When a Planet first forms
Density is Constant
Dense materials displace less dense materials
The process of differentiation
Pressurized dense core
Heavy metals, Iron
Example 5a Convection
Rifting -Separation over time, Crust will also thin out
Example 5b Convection and Rifting
P –wave: Similar to a
S-wave: A transverse
An iconic photograph marking the start of the space age shows three men thrusting a satellite above their heads. William Pickering, James Van Allen and Wernher von Braun
lofted a scale model of the Explorer 1 satellite at the US National Academy of Sciences barely two hours after the real thing went into orbit on the night of 31 January 1958.
EXPLORER 1 REVEALS VAN ALLEN BELT IN 1958
Van Allen Belts
Breathable oxygen molecule = O2
Free oxygen is = O
Ozone is O3
shape and size of earthcomposition of earthsilicates- are rocks, stonesdensity of the earthvolume of the earth mass of the earthearthquakesseismic wavesearth's crust - 12 to 43 miles thickmantleliquid outer coresolid inner coredifferentiationsradioactive elementsshape and size of earth
composition of earthsilicates- are rocks, stonesdensity of the earthvolume of the earth mass of the earthearthquakesseismic wavesearth's crust - 12 to 43 miles thickmantleliquid outer coresolid inner coredifferentiationsradioactive elementsradioactive decay
age of earth - 4.6 million yearsconvection in earth's interiorplate tectonicsriftingsubduction P. 158 builds coastal mountainsmagnetic fieldmagnetic lines of forceVan Allen Radiation BeltsEarth's Magnetic field - convection liquid core w/ molten iron core?Atmosphere of the Earthtroposphere up to 12 kmstratosphere - above troposphere composition of the atmospheregreenhouse effectozone layer - about 80,000 ft ultraviolet radiation to O3 atoms