NEED HELP. If u get it right I will mark u as brainiest

Scientist believe that earths core is around 6000°c where does this heat come from

Which of the layers of the earth has the following three characteristics? i. it is a solid outer layer. ii. it is between 3 and 30 miles thick. iii. it is separated into plates. a. the outer core b. the inner core c. the mantle d. the crust

Describe the four major spheres of the earth system; identify the parts of the earth they each represent. explain what is meant by the "earth system."