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.
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Scientists now know all know that the earthquakes are caused by faults and they look at the ground for this activity, thus means that by doing this they knew more and more of the earth.
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:
Explanation: It is to eat smaller insects and to eat animal carcuss or bacteria from the bigger animals body. A food web is a type of setting like a woodland place, a desert a rainforest and so on. And then it explains what animals live in the setting and what smaller animals they eat
