Ecosystems

A system made up of organisms interacting with one another

• biology
• abiotic
• biotic
• ecosystem

Organisms that make up the living part of an ecosystem.

• abiotic
• biotic factors
• ecology
• ecosystems

Nonliving things found in an ecosystem.

• factories
• factor trees
• biotic factors
• abiotic factors

Which is a biotic factor?

• sunlight
• air 
• bacteria
• all of the above

Deserts, mountains, and rivers are all examples of ________.

• vacation spots
• tundra
• ecosystems
• wetlands

Ecosystems are always______.

• always changing
• always balanced
• never changing
• never balanced

There are ecosystems within the Tropical Rainforest.

• True
• False

The bottom layer of the Tropical Rainforest is called the 

• Emergent Layer.
• Canopy.
• Understory.
• Forest Floor.

Everything in an ecosystem is interconnected.

• No, everything works alone.
• Yes, everything works together.

What percent of the earth is covered by rainforests?

• less than 10%
• between 20 & 40%
• approximately 50%
• more than 75%