U2 Biosphere Flashcards
1
Q
What is biomass
A
the mass of living or recently living plants or animals
2
Q
What is a biofuel?
A
a combustable fuel made from biomass (usually crop plants)
3
Q
Name an economically important terrestrial organism?
A
trees - forestry
sheep - wool and lanolin
livestock - food
4
Q
Name an economically important aquatic organism?
A
shellfish and fish - food
seaweed - food/fertiliser
salt - food
5
Q
Process to make biofuels?
A
Fermentation (lack of oxygen) to form methane or biogas or ethanol
6
Q
Advantage of biofuels?
A
Renewable, less CO2 emissions
7
Q
Disadvantage of biofuels?
A
Crops could be used to make food
8
Q
Source used to make bioethanol
A
Sugar cane, maize or other crop plants
