27 thoughts on âThe Weakest Solar Cycle in 100 Yearsâ. 1  Worrying about changes over 100 years of the lifetime of the sun is equivalent to worrying about 1 minute in the course of a human lifetime. 2  Person using the handle CosmicLettuce, you seem to have mis-read the article.
You've already chosen the best response. There are many spheres, like biosphere, geosphere, lithosphere, atmosphere, hydrosphere, cryosphere. The geosphere is the earth itself, the rock,sand,lava etc. It consits of the crust, upper mantle, lower mantle, outer core and inner core.
Layers of the Earth. Remember to be able to tell the difference between the oceanic crust and the continental crusts. And remember that the lithosphere is composed of the earth's crust and the uppermost part of the mantle. The 3 main layers are the core, mantle and crust. The mantle is composed of the mesosphere and the asthenosphere and the uppermost part of the mantle. That uppermost part of the mantle is what is combined with the crust to make the lithosphere. Click on the picture above to go to an interactive website about the Earth's layers and plate tectonics.