5.9.1.4 How Carbon Dioxide Decreased Flashcards
1
Q
How did algae and plants decrease the percentage of carbon dioxide?
A
- photosynthesis
2
Q
What other ways has carbon dioxide percentages been decreased?
A
- formation of sedimentary rocks
- production of fossil fuels
3
Q
How does the formation of sedimentary rocks decrease the percentage of carbon dioxide?
A
- carbon dioxide dissolved in oceans
- then dissolved carbon dioxide goes through a series of reactions to form carbonate precipitates, forming sediments
4
Q
How does the production of fossil fuels decrease the percentage of carbon dioxide?
A
- remains of dead plants and animals are buried under layers of sediments in the ocean, forming sedimentary rocks, oil and gas whilst trapping carbon dioxide
5
Q
How are crude oil and natural gas formed?
A
- deposits of plankton
- form reservoirs under seabed when trapped in rocks
6
Q
What is coal?
A
- it is a sedimentary rock
- made from thick plant deposits
7
Q
What is limestone?
A
- sedimentary rock
- mostly made of calcium carbonate deposits from shells and skeletons of marine organisms
