Chemistry Of The Atmophere Flashcards
How many billion years ago was the earth formed and how was the atmosphere formed ?
4.6 billion years ago the earth was formed
Atmosphere was formed by volcanic activity which end released gases into the atmosphere
What did volcanic activity release into the early atmosphere ?
Water vapour which formed the oceans
What other gas was released into the early atmosphere ?
Nitrogen
How much nitrogen and oxygen is currently in the atmosphere ?
80% nitrogen
18% oxygen
2% other gases
How was oxygen released into the atmosphere ?
Algae formed early on used photosynthesis and used CO2 as food to produce oxygen
What rock is formed by carbon dioxide ?
Limestone
What are the 3 greenhouse gases ?
Water vapour
Carbon dioxide
Methane
What do the greenhouse gases do ?
absorb heat radiated from the Earth then release energy in all directions, which keeps the Earth warm
What are the human activities that contribute towards the greenhouse effect ?
Farming cattle due to cows and methane
Farming rice releasing methane
Burning fossil fuels releasing carbon dioxide
Why is global warming on the rise the past 200 years ?
Human activities e.g burning fossil fuels, farming cattle and rice, deforestation
What are the effects of global warming ?
Rising sea levels
Melting ice glaciers
Droughts
What is carbon footprint ?
How much carbon dioxide is emitted over time by something
What is complete combustion ?
Complete combustion of a hydrocarbon fuel occurs when there is a good supply of oxygen. It releases the maximum amount of energy
What is incomplete combustion ?
Incomplete combustion of a hydrocarbon fuel occurs when there is a poor supply of oxygen. Less energy is released
What is soot ?
Carbon monoxide
