13.1 food chains and energy transfer Flashcards
1
Q
producers definition
A
photosynthetic organisms getting energy from the sun, water, carbon dioxide and mineral ions
2
Q
consumers definition
A
organisms that obtain their energy by feeding on other organisms
3
Q
saprobionts definition
A
group of organisms that break down the complex material in dead organisms into simple ones
4
Q
food chain definition
A
feeding relationship
5
Q
biomass definition
A
total mass of living material in a specific area at a given time
6
Q
how is biomass measured?
A
using the dry mass per given area in a given time (g m-2) or (g m-3)
7
Q
how does energy enter an ecosystem?
A
when sunlight is conserved as chemical energy (e.g. glucose) by plants
8
Q
trophic level definition
A
stage in a food chain
