Essay About Light Energy And Chemical Energy

Review Sheet – Energetics in Marine Ecosystems
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Review Sheet – Energetics in Marine Ecosystems
Explain the meaning of the following terms:
Photosynthesis. [3]
Process of converting light energy from the sun into glucose from carbohydrates and organic substances
CO2+H2O+sunlight → O2+C6H12O6 (glucose)
This process allows energy to become available to higher tropic levels
Factors that affect photosynthesis
Transparency/clarity of water
Depth
Nutrients in water
Chemosynthesis. [3]
Process of capturing chemical energy of dissolved minerals in the deep sea such as hydrogen sulfide to produce organic compounds such as carbohydrates
Occurs because there is no light in the deep sea for photosynthesis to occur
Predator [2]
An animal that eats another animals
Usually secondary consumers in food chains and include carnivores
Tropic level [2]
“Feeding levels” in a food chain or a food wed
Producer → primary consumer → secondary consumer
Producer [1]
Synthesizes organic substances form simple organic compounds using light energy from the sun–photosynthesis
Producers provide food for almost all other organisms in food chains/webs
Primary consumer [1]
An organism that obtains its energy requirements by feeding on other organisms
Primary consumers (herbivores) feed on plants materials
Secondary consumers (carnivores) feed on herbivore
Primary productivity [1]
Rate of production of biomass per unit area per year (or per unit volume in aquatic ecosystems)
What is primary source of energy? [1]
Sun light
Explain why not all the energy from the sun becomes available as net production in phytoplankton [3].
Only 1% of the total energy from the sun is captured by Earth and used for the synthesis of organic substances by phytoplankton. Light energy is reflected by surfaces or may pass through a producer without being absorbed