Environmental+Factors

Consult the vocab section of the topic and make sure you can recall and give definitions from your Y12 Ecology Study.

The environment is all the external conditions that affect the life of an organism.

Organisms respond to thier environment so that they can survive and reproduce. This involves finding suitable conditions that supply food, shelter, mates and safety from predators.


 * Abiotic Factors** are physical factors in the environment, such as
 * temperature
 * light intensity
 * humidity
 * atmospheric humidity
 * osmotic properties
 * pH and mineral composition
 * wind
 * Biotic Factors** are factors in the environment due to other living things, such as
 * parasites
 * predators
 * competitors
 * co operations within and between species
 * different relationships within and between species


 * Adaptations** is when a form or structure is modified to suit changed environment