Food Chains and Webs



  • Food Chain - A food chain is the series of organisms showing feeding relationships. A food chain almost always begins with a green plant (producer) which is eaten by an animal (consumer). The arrow means 'is eaten by', and shows the flow of matter and energy along the food chain. There are no decomposers in a food chain.

Food Web Diagram


Biomass Pyramids

Biomass Pyramid Diagram


Biological Magnification


Biological Control

  1. Prickly Pear Cactus - This introduced species was a pest throughout Australian cattle farms. The introduction of the Cactoblastis Moth reduced its numbers through consumption.
  2. European Rabbit - Rabbits arrived in Australia in 1788 and reproduced rapidly. The Myxoma Virus was developed in the 1900's to spread by direct contact and cause death.

Cycles in Nature


WATER CYCLE


CARBON AND OXYGEN CYCLES

Carbon Dioxide+WaterSunlightGlucose Sugar+Oxygen
Arrow
Chlorophyll
CO2+H2OArrowC6H12O6+O2

Glucose+OxygenArrowCarbon Dioxide+Water+Energy
C6H12O6+O2ArrowCO2+H2O+Energy


Previous Topic Random Topic Next Topic
Qld Science Teachers Astronomy Biology Chemistry Geology Physics