Question

If the section "Atmosphere: Up to 6,200 Miles" were organized as problem and solution, which sentence would come FIRST? A The atmosphere contains all of the gases that surround the Earth B It extends 10,000 kilometers (about 6,200 miles) above the planet's surface. C The atmosphere can be divided into several layers. D It protects the organisms of the biosphere from the sun's ultraviolet radiation.

Answer 1

Answer: C. The atmosphere can be divided into several layers.

Explanation:

The atmosphere is a mixture of gases. The primitive earth atmosphere was reducing upto 6200 miles ago. The reducing gases consists of methane, nitrogen, water vapors, and others. Oxygen was not present in the atmosphere. The atmosphere was divided into several layers. The atmospheric layers were distinguished into mesosphere, exosphere, thermosphere, and others.