Question

Which of these layers of Earth's atmosphere is closest to its surface?

Answer 1

The troposphere is closest to Earth's surface which is reaching from about seven and 15 kilometers (five to 10 miles) from the surface. The troposphere is thickest at the equator, and much thinner at the North and South Poles.

Answer 2

Troposphere

Step-by-step explanation:

The layer closest to Earth's surface is the troposphere, reaching from about seven and 15 kilometers (five to 10 miles) from the surface. The troposphere is thickest at the equator, and much thinner at the North and South Poles.