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B7.1
Living organisms are
interdependent…read more

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Energy from the Sun
· Thermal energy
· Light energy
­ plants absorb a tiny percentage to make
new materials in Photosynthesis
· Carbohydrates
· Fats
· Proteins…read more

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Feeding
· Autotrophs ­ make their own food
­ Green plants
­ Non-green microorganisms
· Heterotrophs ­ can't make their own
food
­ Herbivores
­ Carnivores
­ Decomposers (feed on waste)…read more

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Energy and mass in an ecosystem
· Trophic (feeding) level · Food chain
Tertiary consumer Flea
Secondary consumer Fox
Primary consumer Rabbit
Producer Grass…read more

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Energy and mass in an ecosystem
· Pyramid of numbers · Pyramid of biomass
- no. of organisms at each - mass of organisms at
trophic level each trophic level
fleas fleas
fox fox
rabbits rabbits
grass grass…read more

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