Ecology -Ecosystems

Factors such as sun, water or rocks are examples of 

• biotic factors
• abiotic factors

All organisms on planet Earth rely on the ________ for energy.

• moon
• sun
• producers

All food chains, food webs and energy pyramids begin with the ________________.

• consumers
• producers
• sun

The amount of energy passed from each level in an energy pyramid is _________.

• 1000
• 100
• 10%

As energy moves up each level in an energy pyramid there is _______energy.

• more
• less

Organisms at the top of a food chain are _____________ consumers.

• tertiary
• secondary
• primary

A primary consumer can be 

• carnivore/herbivore
• herbivore/omnivore
• carnivore/omnivore

Another term to describe consumer is 

• producer
• autotroph
• hetrotroph

Another term to describe producers is 

• consumer
• autotroph
• heterotroph

Organisms that return nutrients to the ecosystems are

• producers
• consumers
• decomposers