Question

The Sun has been radiating an enormous amount of energy at the present rate for nearly ____ years and will continue radiating at that rate for about ____ years more.

• A. 5 billion years
• B. 5 billion years

Answer 1

Solar energy:

1. The sun has been emitting massive amounts of energy at the current pace for approximately $5\mathrm{billion}$ years as well will be continuing to do so for another $5\mathrm{billion}$ years.
2. Only a small portion of solar energy enters the earth's atmosphere. Approximately half of the solar energy is consumed or the majority of the energy that reaches the Earth's surface is absorbed, just a little portion is reflected.