The heat that remains inside the Earth from its creation and radioactive decay are its main heat sources.
The deep earth receives heat from three main sources: (1) heat left over from the planet's formation and accretion, (2) frictional heating brought on by denser core material sinking to the planet's centre, and (3) heat from radioactive element decay.
The energy produced when unstable atoms decay is known as radioactivity, and it is a substantial contributor to the Earth's heat. The main source are the radioactive isotopes of uranium-235 (235U), uranium-238 (238U), potassium-40 (40K), and thorium-232 (232Th) in the Earth's mantle.
To know more about Earth, click here:
brainly.com/question/12041467
#SPJ4
After its main sequence a medium sized star like our sun becomes a red giant, it grows a lot bigger that it's regular size that it will burn earth into ciders, after that it will eject its own nebula and fade away as a dwarf star.
Answer:
the lithosphere is the solid, rocky crust covering the planet and the hydrosphere is composed of all the water on the planet
Explanation:
The lithosphere and the hydrosphere have numerous similarities, but also numerous differences. The biggest and most obvious difference between these two spheres of planet Earth is that the lithosphere is solid, rocky crust that covers the planet, while the hydrosphere is and is represented by all of the water on the planet. The crust is mostly made up by the volcanic activity, thus through the lava flows and crystallization of the magma, which have created the rocks, or with other words the crust, the land masses. The hydrosphere is represented by the waters, and it has been created by both water coming from the volcanoes, and from the space objects that have been falling on our planet. The waters are generally divided into two categories, saline and freshwater, with the saline being in much higher amount.
The answer to the missing blank above would be 'the Mongols'. The Mongols invaded Russia around 1300s, which arose to economic downfall and overall negative effect to Russia. Because of this, the Russian princes convened and fought to drive Mongols out of the country.
