Unit 3- Humans And Their Environment Flashcards
What are the 3 main natural storages of CO2?
Oceans
Peat bogs
Green plants
What are the 2 main greenhouse gases?
CO2 and methane
What 3 things are reasons for deforestation?
Building, paper, land for farming
What 2 things does deforestation cause? And why?
More methan because of cows, more CO2 because of no photosynthesis
What method makes biofuels
Fermentation
What is fermentation?
Bacteria and yeast break down sugars using anaerobic respiration
What is the equation for making ethanol?
Glucose ——–> Ethanol + CO2 + Energy
How is biogas made?
Through anaerobic respiration of waste materials
Why do the generators/digesters need to be kept at a certain temperature?
To avoid respiration
What is a batch generator?
They are manually loaded with waste, by-products are cleaned after every batch
What are continuous generators?
Constantly makes biogas, waste is always put in and by products steadily come out.
Why are the plants carbon neutral?
Because they have recently lived
What happens to the energy in every stage of the food chain?
Reduces
Name two ways of restricting energy lost in farm animals?
Movement
Heat
Name two ways of preventing over fishing?
Fishing quotas to put limits of fish caught
Net size to let some fish escape
