Biology - Energy transfer and decay

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  • Created by: Holly
  • Created on: 05-11-12 18:41
What is the source of energy for nearly all life on earth?
The sun
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Green plants + algae use a small percentage of the light energy from the sun to make food during which process?
Photosynthesis
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What process supplies the energy for all life processes including movement?
Respiration
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Most of the energy is eventually lost to the surrounding as...
heat
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How is energy lost through the food chain other than heat?
waste material, some of the material is inedible (bone) so doesn't pass to the next stage of the food chain.
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Why do pyramids of biomass get smaller at the top?
Energy is lost through each stage of the food chain
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Why do you rarely get food chains with more that 5 trophic levels?
SO much energy is lost at each stage that there isn't enough energy to support more organisms after 4/5 stages.
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What are living things made of?
materials they take from the world around them
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Plants take what elements from the soil or air and turn into complex compounds(carbohydrates,proteins and fats)?
carbon, oxygen, hydrogen and nitrogen
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How are these element returned to the environment ?
in waste products produced by the organisms or when organisms die. They decay because they are broken down by micro-organisms.
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What conditions do micro-organisms work best in?
warm, moist with plenty of oxygen
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In a stable community the minerals taken out of the soil...
are used and balanced by those that are put back in
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Other cards in this set

Card 2

Front

Green plants + algae use a small percentage of the light energy from the sun to make food during which process?

Back

Photosynthesis

Card 3

Front

What process supplies the energy for all life processes including movement?

Back

Preview of the front of card 3

Card 4

Front

Most of the energy is eventually lost to the surrounding as...

Back

Preview of the front of card 4

Card 5

Front

How is energy lost through the food chain other than heat?

Back

Preview of the front of card 5
View more cards

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