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1 2 3 4 5
6 7 8 9 10
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Habitats
21 22 23 24 25
What signs tell you if something is living?
MR FREGSMR FREGSMMoveRReproduceFFeedRRespiration (take in and give out gases)EExcretion (get rid of waste)GGrowSSensitivity (reacts to things round about it)
How can you find out what type of plants and animals live in a particular habitat?
Take a sample
What is a quadrat used to sample
Plants and slow moving animals
How would you measure the ABUNDANCE of an organism in a quadrat?
Count the number of squares which contain the organism
How would you measure the ABUNDANCE of daisies and dandelions in this quadrat?
Daisies: 4
Dandelions: 5
(only count the squares with the organism in it)
List 2 things you should do to improve reliability when using a quadrat.
1.Take many samples
2. Make sure the quadrat is thrown randomly
What is an abiotic factor.
Name 4 abiotic factors which could affect an organism in its environment
A non living factor eg.
temperature, rainfall, light, light, pH
What would you use to sample insects?
A pitfall trap
How should you use a pitfall trap?
•Set it level with Set it level with the groundthe ground
•Place leaf litter in Place leaf litter in bottombottom
•Cover with stone Cover with stone or leavesor leaves
•Make drainage Make drainage holes in bottomholes in bottom
Image: BBC website
Why should you cover a pitfall trap?•To stop predators To stop predators seeing inseeing in
Image: BBC website
Why should a pitfall trap have drainage holes?
•To stop it filling To stop it filling with rainwater and with rainwater and drowning the drowning the insectsinsects
Image: BBC website
Why should a pitfall trap be level with the ground?
•To allow insects to To allow insects to fall into itfall into it
Image: BBC website
How can you improve the reliability of a pitfall trap?
•Take many Take many samplessamples
Image: BBC website
What could you use to help you identify unkown organisms?
A KEY(branched key or paired statement key)
What type of key is this?
Pupils in front row
Male Female
Brown hair Other hair colour
John
Brown eyes Blue eyes
Lisa
Jemma Claire
BRANCHED KEY
Which girl does not have brown hair, but does have brown eyes ?
Pupils in front row
Male Female
Brown hair Other hair colour
John
Brown eyes Blue eyes
Lisa
Jemma Claire
Jemma
What type of key is this?
1. The main body of the chicken is white. go to 2 The main body of the chicken is brown or black. go to 4 2. The feet have feathers on them. Brahma The feet don’t have feathers on. go to 3 3. The hackle feathers (on the neck) are black. Light Sussex The hackle feathers are white. White Leghorn
PAIRED STATEMENT KEY
Give three features of a white leghorn chicken?
1. The main body of the chicken is white. go to 2 The main body of the chicken is brown or black. go to 4 2. The feet have feathers on them. Brahma The feet don’t have feathers on. go to 3 3. The hackle feathers (on the neck) are black. Light Sussex The hackle feathers are white. White Leghorn
The main body of the chicken is white
The feet do not have feathers on them
The hackle feathers are white
What are biotic factors, list some biotic factors
Factors related to living things which could affect the number or distribution of organisms in an ecosystem eg. Disease, predators , food supply.
What is our environment?
The area around us
What is a habitat?
The place where an organism lives
Name 2 resources that plants might compete for.
1.Light
2. Water
(if in limited supply)
Name 2 resources that animals might compete for
1.Food
2. Space
(if in limited supply)
Which habitats do you think will contain the greatest number of plants and animals.
Wild meadow
Urban wasteland
Farmers field
Most - wild meadow (totally natural)
Medium – farmer’s field (may contain pesticides)
Least - urban wasteland (less food, some toxic
substances)
How does a Tulgren funnel work?
•Soil organisms move away from the heat and the light produced by the bulb
•fall into the beaker
•the organisms can be examined using a microscope.