Plants use the light from the sun to make food for themselves. The plants are then eaten by animals, then they are eaten by other animals, etc. The sole source of energy is from the sun.
it's called the crust...
There are thousands of species - plants and animals - that have survived for thousands of years in the deserts.
Geothermal energy is energy stored in the form of heat beneath the surface of the solid earth.
Save energy, save the earth
All energy used in and by life on earth comes form the Sun - (excepth those ecosystems round black smokers where the enery is chemical energy form earth processes)
It is not necessary that our life forms on planet earth require energy only from sun. Plants can photosynthesize and survive under artificial light. The only thing is we don't have an alternative source of energy.
Geothermal energy is constantly being renewed from below, by heat from the interior of the Earth. The limit is on how much energy can be extracted at a continuous rate, so that there is no lapse in the supply while the rocks are reheated.
An object that rotates has the tendency to continue rotating. There is no need for a continuous energy supply. In this case, the rotational energy was there from the moment that Earth formed. - Actually, to be precise, at first there was much more rotational energy; Earth's rotation has been slowing down due to tidal forces. It will continue slowing down until Earth always shows the same side to the Moon.
If the earth's supply of energy stopped, Caveman time!
Water will exist on earth forever because the water cycle gives a continuous supply of water.
light energy
There is an unlimmited supply. God has created our earth to recreate Geothermal Energy on its own.
the energy the sun gives us is called solar energy.
the electric generater in the center of the earth
Moving to renewable energy for electricity would extend the Earth's supply of the fossil fuel oil.
Short answer: No. There is life on Earth that does not require or use the Sun as its basic energy supplier. In deep ocean environments there are animals that use the thermal ports of underwater volcanoes to supply their energy needs.
Earth's water is continuously recycled through evaporation and precipitation, so there is a continuous supply of water for use.