Question

select the correct answer. auroras are lights that appear at earths northern and southern poles. what is the main cause of an aurora? a. solar wind enters earths atmosphere, and particles interact with ions. b. bubbles of gas are ejected from earths outer crust. c. sunlight reflects off the surface of the moon during an eclipse. d. the northern and southern poles are cooler than the rest of earth.

Explanation:

Auroras are caused by solar wind carrying charged - particles that enter Earth's atmosphere. These particles interact with gas molecules (ions) in the upper atmosphere, causing them to emit light. Options B, C, and D have no relation to the formation of auroras.

Answer:

A. Solar wind enters Earth's atmosphere, and particles interact with ions.