The correct answer is:
D. It provides the air necessary for the survival of living organisms.
Oxygen is essential for the process of respiration in many living organisms, allowing them to produce energy needed for survival.
The table below shows the concentration of gases found in Earth's atmosphere.
GASES IN EARTH'S ATMOSPHERE
Gases Concentration (%)
Nitrogen 78
Oxygen 21
Other gases 1
How does the oxygen in the atmosphere help protect and support life on Earth?
A.
It forms nutrients for plants by condensing and falling to the ground.
B.
It provides the gravity that all things need to keep from floating away.
C.
It creates cool temperatures on Earth by reflecting the Sun's rays.
D.
It provides the air necessary for the survival of living organisms.
1 answer
1 answer