EARTH'S PROTECTIVE SHIELD. Earth is surrounded by invisible gases that form a thin protective blanket that we call the atmosphere. It contains the oxygen that we breath as well as other important gases such as nitrogen, carbon dioxide, water vapor, and ozone.
Plants and grass and trees and stuff <span />
To pump blood through out our body and to keep us alive
Answer:
The answer is Astronomy. It means the study and interpretation of celestial bodies.
Explanation:
