Env. Science Final Review

The gas that is most abundant in the atmosphere is

• oxygen
• nitrogen
• carbon dioxide
• argon

What absorbs ultraviolet rays in the atmosphere?

• troposphere
• stratosphere
• ozone layer
• greenhouse gases

What does this diagram illustrate?

• Ozone Layer
• The Greenhouse Effect
• Ultraviolet Radiation
• Layers of the atmosphere

Where is the ozone located?

• troposphere
• stratosphere
• mesosphere
• thermosphere

What chemical is responsible for breaking up the ozone?

• CFCs
• Carbon Dioxide
• Nitrogen
• Oxygen

This protects us from harmful UV rays from the sun

• Troposphere
• Stratosphere
• Greenhouse Effect
• Ozone Layer

The picture shows what type of succession?

• primary
• secondary
• tertiary
• quadanary

The first organisms that appear in an ecological community

• ecological succession 
• primary succession 
• secondary succession
• pioneer speciles

A nonliving element in an ecosystem is an 

• animal
• abiotic factor
• biotic factor
• organism

A living or once-living organisms in an ecosystem is a

• population
• biotic factor
• abiotic factor
• community