Download Biosphere - Perth Grammar

Name:
Summary sheet: Investigating an ecosystem
Give definitions and examples for the following terms:
Habitat ___________________________________________________
Community ________________________________________________
Ecosystem _________________________________________________
Population _________________________________________________
Sampling (fill in the following table)
Technique Example of
Drawing of technique
used to
organism that in use
sample
can be
organism
sampled.
Quadrat
Pitfall
trap
Possible source
of error
Way to reduce
error
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-
-
-
-
-
-
-
-
-
Abiotic factors
Abiotic factors are non living things which can affect living things in an ecosystem
List examples of abiotic factors
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1
Measuring abiotic factors (fill in the table)
Meter used
Light meter
Moisture meter
Sources of error
-
How to reduce errors
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-
-
-
-
-
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Abiotic factors can influence the distribution of organisms.
What effect does light intensity have of daisy numbers and why?
Effect____________________________________________________
Why _____________________________________________________
__________________________
How It Works
Give definitions and examples for the following terms:
Producer__________________________________________________
Consumer _________________________________________________
Food chain ________________________________________________
Draw an example of a food chain
What do the arrows in a food chain/web show? ________________________
2
Explain what would happen if the greater
spotted woodpecker was removed.
____________________________
____________________________
____________________________
____________________________
____________________________
____________________________
____________________________
___________________________________________________________
___________________________________________________________
Energy is lost from every level of a food chain make a list of the ways energy can be
lost:
A pyramid of numbers shows the number of organisms at each level of a food chain.
Draw a pyramid of the following:
Algae -> Tadpole -> fish
(100)
(30)
(1)
What does a pyramid of biomass show? ________________________________
______________________________________________________________
3
The growth rate of a population is dependant of what two factors?
Describe and explain what is happening in terms of birth and death rates at the
different various points on the graph.
Description:
Description:
Explanation:
Description:
Explanation:
Explanation:
Number
of
organisms
Description:
Explanation:
Three factors which can limit a population are:
Competition
Competition occurs both in the plant and animal kingdom when organisms need the
same resource.
Make a list of resources plants compete for and a list of resources animals compete
for
Plants
Animals
4
Describe the effects of competition in plants and animals
Plants: _______________________________________________________
_____________________________________________________________
Animals: ______________________________________________________
_____________________________________________________________
Nutrient Cycles
Why are they important? ____________________________________________
_______________________________________________________________
Draw out the nitrogen cycle
Control and Management
Pollution affects air, fresh water, sea and land
Write about the negative effects of using fossil fuel and nuclear power.
Fossil fuel ______________________________________________________
_______________________________________________________________
_______________________________________________________________
Nuclear power ____________________________________________________
_______________________________________________________________
_______________________________________________________________
5
Fill in the table about the three main sources of pollution
Source of
Example of pollutant
pollution
Give an example of how pollution can be controlled. _______________________
River pollution
Describe what happens at each stage in a river when organic waste e.g. sewage is
released.
Stage 1: Sewage released
Stage 2:
Level of organic waste is________
Number of bacteria______________
Reason for the number of bacteria__________________________________
Level of oxygen_____________________________________
Name of an indicator organism present______________________________
Stage 3:
Level of organic waste is________
Number of bacteria______________
Reason for the number of bacteria__________________________________
Level of oxygen_____________________________________
Name of an indicator organism present______________________________
Stage four:
Level of organic waste is low
Number of bacteria is low
Reason for low bacteria numbers is that their food source has gone.
Level of oxygen is high
Organisms present ____________________________
6
What is an indicator species and give an example of one
Definition_____________________________________________________
_____________________________________________________________
Example: ______________________________________________________
Fill in the table with two examples of poor management of natural resources and
possible improvements
Example of poor
management
Effects of poor management
Possible improvements
How do farmers control the components of the ecosystem in their fields?
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
Extra Notes on biosphere/ points to remember.
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