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Pathways of energy
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learning
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ib
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Sabina Ahmed
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Criado por
Sabina Ahmed
aproximadamente 9 anos atrás
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Pathways of energy
Our sun is 4.5 billion years old-half way through its life
It has burned up about half of its hydrogen in nuclear fusion-this causes the release of energy
The energy is in packets called photons ( it takes 8 minutes for a photos to reach Earth)
Photosynthesis- is the only way that solar energy can enter an ecosystem
What is in sunlight (solar radiation)?
Sunlight contains a wide spectrum of wavelengths
Most of it is ultraviolet (UV) visible light and infrared radiation
Almost half of the suns total radiation is visible light
Albedo-is the reflective power of a surface
49% that is absorbed at the surface, only 0.06% is captured by plants!!!
WHAT HAPPENS TO UPCOMING SOLAR ENERGY?
DESCRIBING:
Very little of sunlight from the Sun ends up as biomass in ecosystems
Some is lost before it even gets to the Earth
49% that is absorbed by the surface much of it fails
EXPAINING:
Light doesn't hit the chloroplast
Light is transmitted alone the surface on the leaf
Some is reflected
Photosynthesis (conversion of light to chemical energy) is inefficient
Once light is converted into chemical store transformation-the energy is in usable form for producers and those higher up the food chain
At each trophic level energy is lost from the food chain
Respiration is inefficient, resulting the further heat loss
PYRAMID REPRESENT THE ENERGY TRANSFER
BIRD
CATEPILLAR
oak
MICROBES
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