Carbon (cycle week 1) Flashcards
1
Q
How does C02 effect oceans
A
- leads to ocean acidification0
- acid tends to dissolve shells
2
Q
State the equation for photosynthesis
A
- C02 + H20 —> CH20 + 02
(respiration goes the opposite way)
3
Q
why do we have an oxygen rich atmosphere
A
- the burial of organic matter
4
Q
why is there less productivity in the tropics
A
more phytoplankton in the sub tropics
5
Q
ocean carbon
A
- phytoplankton produce organics and consume co2 and nutrients
- organics sink and respired by the rest of the food web.
- snowfall releases nutrients and carbon to deep water
6
Q
How is peat formed
A
- water-logged conditions limit oxygen and so organics build up
7
Q
Carbon on leaves in terrestirla environments
A
- respiration of leaf litter adds organics to soil
- carbon consumed by microbes on dead leaves
8
Q
How are fuels formed
A
- when organic matter is buried
- temperature and pressure conditions cause matter to mature and drive of oxygen (making hydrocarbons)
9
Q
what is log10 10-7
A
-7 as they cancel
10
Q
how does calcium carbonate form
A
- in ocean from carbonate ion and the dissolved calcium in salt water
- ## biomineralization- hard shelly material by marine organisms
11
Q
what else can carbon do with rocks
A
- c02 can dissolve rocks through silicate weathering
- products washed into ocean and can form calcium carbonate and opal shells
