lec. biology ecosystems benchmark 2 explain how energy flows through familiar ecosystems
TRANSCRIPT
LEC. Biology EcosystemsBenchmark 2
Explain how energy flows through familiar
ecosystems.
Plant POWER
Comes from the sun
THE FOOD FACTORY
Leaves are the energy factories
of the plant.
Leaves use sunlight,carbon dioxide from air,
and water from rainfall or soilto make food energy.
SUNLIGHTENERGY
Energy from the sunhelps plants make food energy.
Living things need food energy to grow and reproduce. Plantsmake their own food. The cowand the person need to get theirfood.
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SUNLIGHTENERGY
The plant’s food energy is transferred
to the cow when the coweats the grass. The cow
uses this plant food energyto grow and reproduce.
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SUNLIGHTENERGY
The cow’s food energy is transferred
to the person when the maneats a hamburger or a steak.
The personuses this cow food energyto grow and reproduce.
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All living things depend on the sun for energy.
Plants are able to...
From Carbon dioxide in the air and water in the soil
using the sun’s energy.
http://www.cord.edu/faculty/landa/courses/e103w00/sessions/ecosystem.html
http://www.globalchange.umich.edu/globalchange1/current/lectures/kling/highertrophic/trophic2.htm
Pyramid of Biomass
Producer
Herbivore
Carnivore
Carnivore
producerherbivore
carnivore
carnivore
Pyramid of Numbers
Participants and relationships:Food chain, food web, energy pyramid, energy flow,producers, consumers, decomposers
Conservation of Energy
Key Concepts
Energy pyramids for food websin various ecosystems.
Real-world contexts
Which of the following would be considered a correct food chain?
a) Food C n hai Cunl t igh R tabbi
b) Sunlight Cl nt a Cow um nH a
c) Sunlight Cow um n H a Cl nta
d) Human Cl nt a Cunl t igh Cow
e) Vertebrate Cnv rt r t e eb a e Cow um nH a
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All answers:
A food chain usually starts with energy from the sun being incorporated into plants as food through the process of photosynthesis. The plant is then eaten by a herbivore (plant eater) then it’s eaten by a more complex animal.
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A food chain usually starts with energy from the sun being incorporated into plants as food through the process of photosynthesis. The plant is then eaten by a herbivore (plant eater) then it’s eaten by a more complex animal.
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Which of the following is NOT a part of a food chain?
a) Producer
b) Consumer
c) Decomposer
d) Herbivore
e) Hydrologic cycle
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The hydrologic cycle, also known as the water cycle, moves water from the surface to the atmosphere through evaporation and then back to the surface through precipitation.
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The hydrologic cycle, also known as the water cycle, moves water from the surface to the atmosphere through evaporation and then back to the surface through precipitation.
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Question One
Question Two