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Unit 1
1.6 Ecosystems, Nutrient Cycles, Human Impact on Environment
Food Chains and Food Webs
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Cards (5)
What is the source of all energy in biological systems?
Sunlight
What is sunlight absorbed by to be passed on in food chains?
Photosynthetic organisms
(
Producers
)
Why are plants always the first link in food chains?
They're
producers
- they convert the energy from the sun into
chemical energy
(
biomass
)
Why does energy decrease as you go down a food chain?
It's
lost
in
life processes
, (
movement
,
growth
,
cell repair
and
reproduction
)
waste materials
and
respiration.
What is the equation to calculate the efficiency of energy transfers?
Energy transferred to next level/total energy from previous level
X 100