Eaths Atmousphere And Gases Flashcards
What was the earth’s atmosphere like 4.5 billion years ago
It had volcanic activity
There was co2 h2o and n2
What caused the changes to get to the earth’s atmosphere from 4.5 to 4 billion years ago
Earth cooled down and water vapour condensed to form oceans
What was the atmosphere like 4 billion years ago
It was Mostly water
What caused the changes of earth’s atmosphere from 4 to 2.5 billion years ago
Bacteria and algae evolved and they used co2 to make food for themselves by photosynthesis
What was the atmosphere like 2.5 billion years ago
Mostly and increased co2
What caused the changes in the earths atmosphere from 2.5 to 200 million years ago
Animals started to evolve and respire
Photosynthesis and respiration starts to balance each other out
What was the atmosphere like 200 million years ago
Mostly nitrogen and oxygen stabilises
What changes where there to get to 200 Million years ago and now
No changes happend
What is the percentage of our air using oxygen carbon dioxide etc…
Oxygen = 21%
Carbon dioxide = 0.04%
Nitrogen= 78%
Other gases=0.06%
What is fractional distillation
It’s a technique used to separate mixtures of liquid and relies on the fact different liquids have different boiling points
What is the method of fractional distillation
Air is cooled to -200 c and the solid carbon dioxide and water is removed
The remaining liquid is fed into the bottom of the fractionating column which is warmer at the bottom than the top
Oxygen and argon have higher boiling points so they remain as liquids and are piped off at the bottom of the column
The temperature at the bottom of the column is higher than the boiling point of nitrogen so it boils and rises up the column and it piped off as gas at the top
Can crude oil be separated by fractional distillation
Yes
