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Both. (the sun & radioactivity).
From radioactivity in the Earth's interior.
Earth has internal energy due to radioactivity. I am not sure what you mean by radioactive external energy, or simply by external energy. Earth gets most of its energy from the Sun.
yes its is natural
Natural gas is found in the sediments pertaining to Earth's crust.
Radioactivity is 100% natural. It has been here since the first supernova star billions of years before the formation of earth about 4.5 billion years ago.
no. radioactivity has been around since the earth's beginnings.
Natural radioactivity. We are sitting / standing / living on the outside of a fission reactor. Friction between the particles of the core etc.also this means that the earth will die from the sun's hot rays
Radioactivity within the Earth.
It Does a man
Both. (the sun & radioactivity).
One thing is that now the correct age of the earth could be calculated. Before radioactivity was discovered the earth was though to have cooled enough to be only about 25 million years old by calculation. The discovery of radioactivity changed all that by increasing the heat the earth could radiate and so increasing the age of the earth dramatically.
Pressure and radioactivity.
From radioactivity in the Earth's interior.
Natural radioactivity. We are sitting / standing / living on the outside of a fission reactor. Friction between the particles of the core etc.also this means that the earth will die from the sun's hot rays
Radioactivity
The Quran was brought to earth in the month of Ramadan