c13-the earth atmosphere Flashcards
(25 cards)
What is the equation for the incomplete combustion of a fuel
6CO2 + 6H2O-C6H12O2 + 6O2
carbonation dioxide + water - glucose + oxygen
What is the atmosphere
A layer of gas surrounding the earth
What was the early atmosphere composed of?
Mostly carbon dioxide
How did oceans form?
Water vapour condensing as the Earth cooled
How did the amount of carbon dioxide in the atmosphere decreased to today’s level?
it dissolved in the oceans
photosynthesis
converted to fossil fuse
precipitated as in solid metals carbonates
When did life start to appear? And what was the impact of this on oxygen in the atmosphere?
About 2.7 billion years ago
amount of atmospherical oxygen increased as it was released in the photosynthesis
How has the amount of nitrogen in the atmosphere changed over time?
Increase slowly as it is very stable molecule
Why can’t scientist not be sure about the composition of the earths early atmosphere?
It was billions of years ago and evidence is limited
What is the current composition of the atmosphere?
Approximately 80% nitrogen 20% oxygen and trace amounts of other gases such as carbon and dioxide water vapour and noble gases
What is a greenhouse gas?
A gas that trapped radiation from the Sun
What type of radiation do greenhouse gases absorb?
Long wavelength infrared radiation
Name three greenhouse gases
Methane
carbon dioxide
water vapour
If two ways recent human activities have increased the amount of atmospheric carbon dioxide
Burning fossil fuels
Deforestation
Give two ways recent human activity has increased the amount of atmospheric methane
Rice farming
Cattle farming
What is global warming?
An increased in the overall global average temperature
What is global climate change?
The change in long-term where patterns across the planet
What are some possible effects of climate change?
Sea levels rising
Extreme weather events
Changes in the amount and time of rainfall
Changes to ecosystems and habitats
Polar ice cap melting
What is carbon footprint?
The amount of carbon product, process, or person releases in the atmosphere over its lifetime
How is carbon monoxide formed and what is the danger associated with it?
Incomplete combustion,
colourless and odourless toxic gas
How are particulate formed and what are the dangers associated with them?
Incomplete combustion,
global dimming, respiratory problems, potential to cause cancer
How is sulfur dioxide formed and what are the dangers associated with it?
Sulfur impurities in fossil fuels react with oxygen during combustion,
acid rain respiratory problems
How are oxides of nitrogen formed and what are the dangers associated with them?
Atmospheric oxygen and nitrogen reacts in the heat of a combustion engine,
acid rain respect your problems
Which pollutant is formed in car engines from the reaction between two glasses that occur naturally in the atmosphere?
Oxides of nitrogen
Name the process by which carbon dioxide changes state from a solid to a gas
Sublimation
