Biotic vs Abiotic
The nonliving parts of an ecosystem
Abiotic
The process where plants make their own food
Photosynthesis?
Process that releases energy
What is cellular respiration?
Original source of energy in most ecosystems
The Sun
Can matter be destroyed?
No
The living parts of the ecosystem
Biotic
The photosynthesis reactants
Carbon Dioxide (CO2) + Water (H2O) + Energy from the sun?
The cellular respiration reactants
Glucose (C6H12O6) + Oxygen (O2)
What arrows show in a food web
Direction of energy transfer
About how much energy transfers from one trophic level to the next?
About 10%
List two abiotic factors in an ecosystem
Carbon dioxide, water, sunlight, soil, etc.
The photosynthesis products
Glucose (C6H12O6) + Oxygen (O2)
Carbon Dioxide (CO2) + Water (H2O) + ATP Energy
Organisms that break down dead matter
Decomposers
Definition of conservation of matter
Answer: Matter is not created or destroyed, only rearranged or transferred.
Matter moves from abiotic → biotic during this process
Photosynthesis?
(moves from the carbon dioxide/water/soil, which are all abiotic, to the plant which is biotic)
The formula for photosynthesis with the names and symbols
Carbon Dioxide (CO2) + Water (H2O) + Energy from the sun --> Glucose (C6H12O6) + Oxygen (O2)
The formula for cellular respiration with names and symbols
Glucose (C6H12O6) + Oxygen (O2) --> Carbon Dioxide (CO2) + Water (H2O) + ATP Energy
Where the rabbit gets its energy in
grass → rabbit → fox
Grass
Why sunlight is an ecosystem input
Energy enters ecosystems from the Sun.
Matter moves from biotic → abiotic during this process
Decomposition?
(matter moves from the decomposer, which is biotic, to the soil which is abiotic)
Explain how abiotic matter becomes biotic matter
Plants use carbon dioxide, water, and nutrients in the soil to build living tissue.
Which process stores energy and which releases energy
Photosynthesis stores energy; cellular respiration releases energy
Explain how salamander matter can become part of a hawk
Matter transfers from salamander → snake → hawk
What Helmont's tree growth experiment tells us about the matter source
Most tree matter came from carbon dioxide in the air.