The study of the interactions between groups of organisms and their environment

• Ecology

• Botany

• Microbiology

• Biochemistry

Living factors that affect organisms in an ecosystem

• biotic

• edaphic

• climatic

• abiotic

Non-living parts of the environment that influence organisms

• aquatic

• biotic

• abiotic

• climatic

all animals can also be referred to as

• pests

• flora

• predators

• fauna

Make their own food using energy from the sun

• Consumers

• Producers

• Fauna

• Prey

Organisms that feed on other organisms

• consumers

• producers

• parasites

Most food chains start with a

• parasite

• animal

• green plant

Nutrients need to be recycled because

• they need to be used over and over

• they don't actually need to be recycled

• they are locked inside living things until they die

• we have an unlimited amount of all nutrients on earth

in a food chain

• all energy passes from one organism to the next

• only a very small amount of energy passes from one organism to the next

• the chain usually includes at least ten organisms

• the chain usually starts with an animal

a downfall of using a pyramid of numbers is

• it doesn't always represent the number of organisms at each level

• there are no downfalls

• it shows the size of the organisms clearly at each level