From our closest star: Hydrogen fusion (The Sun)
from under our feet: Geothermal heat; geothermal energy originates from the original formation of the planet (20%) and from radioactive decay of minerals (80%)
The only two main sources of energy on earth that I know are the sun and the interior of the earth
the sun and food
Two sources are sun and Earth's interior
Energy can enter the earth system from internal sources through convection and from external sources through radiation from the Sun (solar energy).
sun,moon,and earth
sun,moon,and earth
The two sources of energy are the sun and energy from the Earth's Interior.
Two sources are sun and Earth's interior
There are many of energy sources in earth like solar energy, geothermal energy, hydroelectricity, tide energy, nuclear energy.
The sun and the earth's interior are the two sources of energy that power earth's systems.
The sun and the earth's interior are the two sources of energy that power earth's systems.
The sun and the earth's interior are the two sources of energy that power earth's systems.
The sun and the earth's interior are the two sources of energy that power earth's systems.
The Sun.
Energy can enter the earth system from internal sources through convection and from external sources through radiation from the Sun (solar energy).
Matter and energy
pressure
the sources of heat is the sun and the solar system this makes the earth have heat and energy. The sun is the earth main source of heat and energy
sun,moon,and earth