B3 (Life on Earth) - keywords

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Species
Similar organisms capable of interbreeding to produce fertile offspring.
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Food chain
A simple chain showing the feeding relationship between organisms in an ecosystem
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Food web
Interlinked food chains in an ecosystem.
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Energy
the ability to do work: measure in joules (J)
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Photosynthesis
The chemical process that takes place in green plants where water combines with carbon dioxides to produce glucose using light.
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Ecosystem
A term that refers to a physical environment, including the conditions there and the organisms that live there.
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Autotroph
An organism that makes it's own food.
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Heterotroph
An organism that is unable to make its own food; consumes other organisms.
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Herbivore
An organism that only eats plants, grass, etc; a primary consumer.
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Carnivore
An organism that eats other animals; a secondary or tertiary consumer.
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Decomposer
An organism that breaks down dead materials and waste products.
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Detritivore
An animal that feeds on dead materials.
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Excretion
The removal of waste products of cell reactions.
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Nitrogen fixing
The removal of nitrogen from the air.
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Denitrification
Taking nitrogen from materials, e.g, nitrates.
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Combustion
Burning in oxygen/air.
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Indicator organism
An organism that is only found in certain conditions.
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Pollution
Harmful additions to the environment.
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Common ancestor
The most recent individual from which all organism in a group are directly descended.
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Fossil
Animal/plant remains preserved in rock.
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Evolution
The gradual process of adaptation of a species over generations.
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Theory of evolution
The most likely scientific explanation, based on evidence, as to why organisms are the way they are.
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Natural selection
A natural process resulting in the evolution of organisms best adapted to the environment.
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Mutation
A spontaneous change in the genetic code of a cell.
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Environmental variation
Variation that occurs as a result of a certain factor in the surroundings.
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Selective breeding
The production if new varieties of animals and plants by artificial selection.
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Extinction
The process by which groups of organisms die out.
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Biodiversity
The range of species in an environment.
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Kingdom
A classification of a group of organisms with a small number of features in common.
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Other cards in this set

Card 2

Front

A simple chain showing the feeding relationship between organisms in an ecosystem

Back

Food chain

Card 3

Front

Interlinked food chains in an ecosystem.

Back

Preview of the back of card 3

Card 4

Front

the ability to do work: measure in joules (J)

Back

Preview of the back of card 4

Card 5

Front

The chemical process that takes place in green plants where water combines with carbon dioxides to produce glucose using light.

Back

Preview of the back of card 5
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