What Is the Source of the Energy That Powers the Earth

question 90

Multiple Choice

What is the source of the energy that powers the Earth system?

• A) heat from Earth's interior
• B) the Sun
• C) both A and B
• D) none of the above

---

Definitions:

Inhalation

The act of breathing in; drawing air or other substances into the lungs.

Subcutaneous

Refers to being located or existing under the skin.

Otic

relating to the ear or its functions.

Intrathecal

Refers to the administration of medications or other substances directly into the space under the arachnoid membrane of the brain or spinal cord.