Chemistry of the Atmosphere Flashcards
1
Q
What was the earth’s atmosphere like 4.6 billion years ago?
A
It consisted of mostly CO2 due to intense volcanic eruptions.
2
Q
What is the gas that makes up most of today’s atmosphere?
A
Nitrogen.
3
Q
What percentage of the earth’s atmosphere is made of oxygen?
A
21%
4
Q
What percentage of carbon dioxide is in the earth’s atmosphere?
A
0.04%
5
Q
What is the word equation for photosynthesis?
A
Carbon dioxide+water (goes to) glucose+oxygen
6
Q
What caused the levels of oxygen in the atmosphere to increase?
A
Plants evolved and began to photosynthesize.
