energy and ecosystems (energy transfers in and between organisms) Flashcards
1
Q
How do plants use the sugars from photosynthesis
A
primarily as respiratory substrates.
to synthesise other biological molecules (cellulose)
2
Q
what is biomass
A
total dry mass of tissue or mass of carbon measured over a given time in a specific area
3
Q
suggest the units for biomass
A
when an area is being sampled: gm-2
when a volume (pond) is being sampled: gm-3
4
Q
how can the chemical energy store in dry mass be estimated
A
using calorimetry
energy released = specific heat capacity of water x volume of water (cm3) x temperature increase of water
5
Q
why is bomb calorimetry preferable to simple calorimetry
A
reduced heat loss to surroundings
