Environments

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the population of another type.The red squirrel population in

Britain has went down due to the introduction of the grey

squirrel.

Slide 10

enviroments

Changing food webs

MAN`S ACTIONS The activities of human beings affects

food webs, e.g. cutting down forests can affect the animal

population in these forests.

MAN`S ACTIONS The activities of humans can also affect

marine life, e.g. fish farming in Scotland has affected the

populations of sea animals.Try and find out about this.

DISASTERS Disasters like oil pollution,radiation,

industrial waste can affect food webs,

Slide 11

environments

making compost

Compost heaps are used by gardeners to fertilize the soil.

They use waste products from both home and garden to do this.

3, The organic waste contains HUMUS which helps to hold water.

A food web exists inside the compost consisting of decomposers,

producers and consumers.

Slide 12

environments

making compost

Decomposers, producers and consumers

Decomposers break down recyclable materials.

Producers trap the sun`s energy and turn it into food.

3. Consumers feed on producers or other consumers.

producers

consumers

consumers

decomposers

Slide 13

environments

making compost

The next slide shows the procedure for making compost.

Slide 14

Slide 15

environments

enviromental factors

The following factors affect where animals and plants will be found.

The temperature of the environment.

The humidity of the air.

The pH of the area.

The light intensity of the area.

The flow rate of the water in the area.

6. The flow rate of wind in the area.

Slide 16

environments

environmental factors

Temperature :-the spring

Gentian is famous for its

blue flowers and grows where

the temperature is low.

Cactus plant found in Arizona .Grows to

a height of twelve feet.Stores every

available amount of water.

Slide 17

environments

environmental factors

Humidity :- Mosses are simple plants which do not have the

ability to absorb water.They are found in damp places.

Slide 18