EVERYDAY SCIENCE

SCIENCE

RESPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Carbon dioxide makes up less than 1 percent of Earth’s atmosphere, and oxygen makes up about 20 percent. These percentages are maintained most directly by
A
respiration and photosynthesis
B
the ozone shield
C
synthesis and digestion
D
energy recycling in ecosystems
Explanation: 

Detailed explanation-1: -Carbon dioxide, also known as CO2, is a simple molecule that makes life on Earth possible. CO2 is called a trace gas because it makes up less than 1 percent of the atmosphere. Even that small amount, however, plays a big role in shaping Earth’s climate.

Detailed explanation-2: -Carbon dioxide (CO2 ) constitutes about 0.03% (300 parts per million) of the atmospheric gases. Whereas, nitrogen comprises 70% and oxygen 21% of the atmospheric gases.

Detailed explanation-3: -CO2 makes up only about 0.04% of the atmosphere, and water vapor can vary from 0 to 4%. But while water vapor is the dominant greenhouse gas in our atmosphere, it has “windows” that allow some of the infrared energy to escape without being absorbed.

Detailed explanation-4: -The balance of oxygen and carbon dioxide is made due to respiration and photosynthesis. During respiration, we leave carbon dioxide and take in oxygen the balance of carbon dioxide and oxygen is made. And during the photosynthesis of plants, the balance of carbon dioxide and oxygen is made.

There is 1 question to complete.