Burning of Fossil Fuels Releases Large Amounts of Carbon Dioxide

question 6

Multiple Choice

Burning of fossil fuels releases large amounts of carbon dioxide (CO₂) into the atmosphere. Approximately what proportion of this CO₂ remains in the atmosphere, contributing to the trapping of heat close to the Earth's surface?

• A) less than 1%
• B) 5%
• C) 50%
• D) 90%

---

Definitions:

Voluntary Control

The ability to consciously control movements of the body or parts of the body, such as limbs.

Striated

Having a series of linear marks, grooves, or ridges; often used to describe muscle tissue that appears striped under a microscope.

Cylindrical-Shaped

Describes an object or structure with a straight, round shape that is uniform in diameter throughout its length.

Myelin

An insulating fatty layer that surrounds the nerve fibers, enhancing the speed of electrical impulses in the nervous system.