Biomass and cycles

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  • Created by: Heather
  • Created on: 27-05-14 20:00
What is a pyramid of biomass?
It reveals the mass of a living material at each stage in a chian,
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What does the amount of material and energy do at each stage?
It decreases at each stage,
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What do the arrows show?
They point in the direction of energy flow so from food to feeder
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What is the ultimate source of energy for living things?
Radiation from the sun,
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What organisms i9n the food chain absorb the sun's light for energy and how?
Green plants and aldae during photosynthesis-the energy is stored in the substances that make up the cells of the plants
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What is the definition of producer?
-Green plants and algae and they make food by photosynthesis,
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What are primary consumers?
These are usually herbivores which eat the plant materials,
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What are secondary consumers?
They are usually carnivores that eat animal material,
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What are predators?
They kill for food and are either secondary ot tertiary consumers,
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What are scavengers?
Thye feed on dead animals,
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What are decomposers?
They feed on dead and decaying organisms and on undigested parts of plant and animal matter in faeces,
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What is the available energy in each stage used for/lost?
for growth and production of offspring, keeping a constant temperature, respiration for ,movement, lost in faeces,
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What does biomass mean? Does it decrease?
The mass of living material at a stage in a food chain which decreases from one stage to another,
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In the pyramid of biomass, what do the bars do as you reach the top?
They become narrower,
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Why is decay important?
it is an essential life process that digests food or waste matter and recycl
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How do microorganisms cause decay?
By releasing enzymes that break down compounds to be absorbed by cells,
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What are the two main groups of decomposers?
bacteria and fungi,
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What are the three factors that affect decay?
-Moisture, -Temperature, -Amount of oxygen,
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How is carbon dioxide removed from the atmosphere?
Green plants and algae remove carbon dioxide from the atmosphere by photosynthis, -Absorber into seas and lakes, -locked in sedimentary rocks,
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How is carbon dioxie returned to the atmosphere?
-Respiration of aniamls and plants, -In combustion of fossil fuels or wood etc, -Decomposition of dead matter,
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Other cards in this set

Card 2

Front

What does the amount of material and energy do at each stage?

Back

It decreases at each stage,

Card 3

Front

What do the arrows show?

Back

Preview of the front of card 3

Card 4

Front

What is the ultimate source of energy for living things?

Back

Preview of the front of card 4

Card 5

Front

What organisms i9n the food chain absorb the sun's light for energy and how?

Back

Preview of the front of card 5
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