and functioning of

heehawultraMechanics

Feb 22, 2014 (3 years and 4 months ago)

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Topic 2.5
-

The Functions
and functioning of
Ecosystems

A
producer

makes
organics molecules
from simple non
-
organic chemicals
using energy from its
environment.

Plants use light


Photo
-
autotrophs

Some bacteria can
use
sulphur



Chemo
-
autotrophs



A Consumer gets all its nutrition in the form of
complex organic chemicals made by other
organisms. Examples. Include:





Herbivores
-

Primary consumers




Predators
-

Secondary consumers

A
decomposer

breaks down dead organic
material into smaller organic or inorganic
compounds. Fungi and bacteria are
decomposers.

Define Photosynthesis in terms of energy
and material transfers
and transformations:


Material

Transfers

: CO
2
from the air to the leaf, H
2
O from the soil to the leaf, Glucose

from the leaf to other parts of the plant, O
2

from the leaf to the air.
Transformations

: CO
2
and

H
2
O becomes Glucose and O
2

Energy


Transfers

: Light energy from the sun to chlorophyll.

Transformation

: Light Energy to Chemical energy.

Feng

Shui

Newsletter
-

http://www.mynewsletterbuilder.com/ex/template_content_corner/ex110/images/water.jpg

Visible light is a mixture of wavelengths we call
colours
.
We
separate them into 7
colours
.
What are they?

Red , Orange, Yellow, Green,
Blue, Indigo, Violet

http://quarknet.fnal.gov/quarknet
-
summer
-
research/QNET2010/Astronomy/em_spectrum.jpg

Green light is reflected from the leaf. Light energy is the
energy source for photosynthesis. If only green light is
shone it will all be reflected so there is no energy for the
plant to make it’s food so it dies.

A carbohydrate is made from Carbon, Hydrogen and oxygen. Where does
each of these atoms come from?


Carbon




Hydrogen




Oxygen




From the Carbon dioxide in the Air,


From the water in the soil. The oxygen from the water is given off!


From the Carbon Dioxide in the air

Energy flows but Nutrients cycle

Nutrients

Light

Energy

Heat

Energy

An Ecosystem

Biochemical cycles


All organic chemicals are part of cycles; they
will form parts of the air, the land, the sea and
living organisms at different times and will
pass from one storage to the others and back.

Sea


Organisms



Sediment

Land


Organisms



Soil


Rocks

Rain water run off

Qu.1. What is precipitation?


Qu.2. Which 3 processes involve evaporation?


Qu.3. Where would there be condensation?


Qu.4. What effect would deforestation have on this cycle?

The Carbon cycle


Look at this web site:
http://carboncycle.aos.wisc.edu/


Read the page and test your knowledge with the game at the bottom:


http://www.uwsp.edu/cnr/wcee/keep/Resources/ccgame/background.htm





The nitrogen cycle

Rhizobium

bacteria