biosphere

?
What is a habitat?
the place where an organism lives
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What is a population?
all the organisms of one type living together
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What is a community?
two or more different types of organisms living together
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What is the eco system?
All the organisms and the non living factors make the ecosystem
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A sampling technique used to measure the no. of daises is?
a quadrat
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A sampling technique used to measure no. of woodlice is?
a pitfall trap
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What is an abiotic factor?
a non living factor which affects population
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Give examples of abiotic factors?
light intensity, moisture, PH
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What is a biotic factor?
A living factor which affects population
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Give examples of biotic factors?
Disease, food, competition
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Competition is when...
organisms require the same resources
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What can light intensity affect?
Where a plant grows
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How can someone miss-use a quadrat?
only throwing it once. placing it where they want
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How can problems of a quadrat be solved?
throw it atleast five times, randomly throw it
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What is a producer?
an organism that makes its own food by the process of photosynthesis
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What is a consumer?
An organism that eats another organism
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What do the arrows in a food web show?
the direction of energy flow
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two ways that energy can be lost from a food web are?
heat and movement
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What does the growth of a population depend on?
birth rate and death rate
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State three factors which can limit population growth?
food, disease, competition
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Why is the nitrogen cycle important?
the nutrients required for growth can be recycled
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What happens when you remove one species from a food web?
It effects other organisms
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What is a pyramid of numbers?
The no. of organisms at each level
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What is a pyramid of biomass?
The mass of organisms at each level
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Name the environments that pollution can effect
air, fresh water, sea water, land
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What are the three main sources of pollution?
domestic, agricultural, industrial
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What is one way that pollution can be controlled?
to walk instead of using cars
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What are the organisms that feed on organic waste called?
Micro organisms
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What happens if lots of micro organisms are in water?
they use up all the o2, other organisms die
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What are examples of poor management of resources?
over fishing, no crop rotation
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What are the effects of using fossil fuels?
They cause pollution and they are non renewable
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What happens if organic waste is released into a river?
- increase no. of microbes. - less o2 as they use it all up. - fish die due to lack of 02
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What are indicator species?
organisms which show the state of environment. can indicate pollution
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Other cards in this set

Card 2

Front

What is a population?

Back

all the organisms of one type living together

Card 3

Front

What is a community?

Back

Preview of the front of card 3

Card 4

Front

What is the eco system?

Back

Preview of the front of card 4

Card 5

Front

A sampling technique used to measure the no. of daises is?

Back

Preview of the front of card 5
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