2007-03-21 04:25:23 · 5 answers · asked by mikey 1 in Science & Mathematics ➔ Earth Sciences & Geology
The molten core of the Earth and the Sun for sure, but I think chemical reactions and even possibly body heat from all the animals might be the others.
2007-03-21 05:06:27 · answer #1 · answered by chuckiec 2 · 0⤊ 1⤋
What I learned when I was student
- In the earth : 70% are from radioactive desintegration of mainly the potassium 40 and some other radioactive elements.
- tidal forces on the liquid core
- Electromagnetic forces
The rest is peanut
2007-03-21 05:20:47 · answer #2 · answered by omalinur 4 · 0⤊ 0⤋
The molten interior of earth.
The disintegration of radioactive elements
The solar radiation
The energy stored in hydro carbon deposits.
2007-03-21 05:31:10 · answer #3 · answered by anusen1970 2 · 0⤊ 0⤋
I think there's only one main source, the sun, without it there would be no relevant life sustaining heat.
2007-03-21 04:33:00 · answer #4 · answered by Luis 6 · 0⤊ 1⤋
yes because of the gravity of the earth!!
2007-03-23 21:19:03 · answer #5 · answered by Jan Richard O 1 · 0⤊ 0⤋