Respuesta :

Answer : An atmosphere is the layers of gases surrounding a planet or other celestial body. Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases.

Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases. These gases are found in layers (troposphere, stratosphere, mesosphere, thermosphere, and exosphere) defined by unique features such as temperature and pressure

Answer:

The atmosphere is the envelope of gases surrounding the Earth or other planet. It contains 78% Nitrogen, 21% Oxygen, 0.9% Argon, and other gases (such as: Carbon Dioxide, Water Vapor, Methane, and Neon) as the remaining 0.1%.  

+I would have answered this sooner if I saw it. Sorry :(