ESL6 (1-2) Science: Changes in Ecosystem Part 2

Changes in climate, development of disease, and human activity all impact an ecosystem.

• True

• False

the gradual replacement of one community by another

• 
  Biodiversity

• 
  Succession

• 
  Pioneer

• All of above

The first species to move into a lifeless area are called

• secondary species

• 
  pioneer species

• 
  primary succession

• attraction

When an area undergoes a disaster, such as a forest fire, and the area is left with soil, it is called...

• 
  secondary succession

• 
  primary succession

• 
  biodiversity

• climax community

When a disaster strikes, such as a volcano erupts, and the area is left with only bare rock, it is called

• 
  primary succession

• 
  secondary succession

• climax community

• ecosystem

Plant life starting to grow on a volcano

• primary succession

• 
  secondary succession

• climax community

• pioneer community

What is the order of succession shown in this figure?

• 
  A, B, C, D

• B, A, D, C

• C, D, A, B

• 
  D, A, B, C

A pioneer species is...

• 
  a large organism

• 
  the first organisms to adapt to a new environment 

• 
  The best organism 

• 
  Abiotic organisms 

the process by which a new community forms where no community lived before 

• 
  resource

• 
  primary succession

• secondary succession

• competition

Which is the correct order in primary succession?

• 
  Rocks, Lichens & Mosses, Bushes & Shrubs, Trees

• 
  Lichens & Mosses, Rocks, Trees, Bushes & Shrubs

• Trees, Bushes and Shrubs, Lichens & Mosses, Lichens & Mosses

• 
  Rocks, Grass, Trees, Bushes & Shrubs