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.
Summary There are three compositional layers in the earth, the core, the mantle, and the crust. The physical properties, of the outer portion of the earth produces the mesosphere, the asthenosphere, and the lithosphere. The lithosphere contains two different types of crust: oceanic and continental. The chemical composition of these types of crusts are different.