IGCSE Bio Unit 3 Ecology Vocabulary

The warming effect of carbon dioxide, methane and other greenhouse gases on Earth.

• Pollution
• Water Cycle
• Greenhouse Effect
• Carbon

 Radioactive pollution leaked from a nuclear power station or nuclear explosion

• Acid Rain
• Carbon Cycle
• Nitrogen Fallout
• Nuclear Fallout

Chemicals used to control unwanted pests

• Herbicides
• Insecticides
• Chemicides
• Pesticides

poisonous waste products created by industrial processes

• Herbicides
• Chemical Waste
• Acid Waste
• Nuclear Fallout

A type of non-biodegradable waste that can be recycled many times

• Chemical Waste
• Nuclear Fallout
• Plastics
• Paper

A group of organisms of one species, living in the same area at the same time.

• Population
• Ecosystem
• Community
• Organism
• Habitat

A unit containing all of the organisms and their environment, interacting together, in a given area e.g. decomposing log or a lake.

• Population
• Ecosystem
• Community
• Organism
• Habitat

All the organisms, of all the different species, living in an area at the same time.

• Population
• Ecosystem
• Community
• Organism
• Habitat

A chart showing the flow of energy (food) from one organism to the next beginning with a producer (e.g. mahogany tree→caterpillar→song bird→hawk)

• Food Web
• Food Pyramid
• Food
• Food Chain

A network of interconnected food chains showing the energy flow through part of an ecosystem.

• Food Web
• Food Pyramid
• Food
• Food Chain