Ecosystems

In which ecosystem can the greatest variety of organisms be found?

• estuary

• lake

• rainforest

Which two ecosystems are terrestrial?

• forests and grasslands

• oceans and grasslands

• forests and estuaries

• ponds and lakes

What is the difference between an ocean ecosystem and a lake ecosystem?

• Ocean ecosystems have saltwater and lake ecosystems have

  freshwater.

• Ocean ecosystems have less animal life than lake ecosystems.

• Ocean ecosystems have less plant life than lake ecosystems.

Which is a difference between the plant life of a rainforest and a deciduous forest?

• The deciduous forest has yearly cycles of plant growth due to changes of seasons, while the rainforest remains hot and wet year-round.

• The deciduous forest remains hot and wet year-round, while the

  rainforest has a yearly cycle of plant growth due to changes of

  seasons.

• The deciduous forest has the most diverse plant life of all

  ecosystems, while the rainforest plant life is scarce.

• The deciduous forest has a warm climate year-round, while the

  rainforest has hot and cold extreme climates.

Bacteria are released into the Gulf of Mexico to help clean up an oil spill. What role do the bacteria serve in the marine ecosystem?

• producer

• consumer

• decomposer

• predator

Which best describes the producers of an ecosystem?

• they provide food to herbivores

• they provide food to decomposers

• they provide hydrogen to the atmosphere

• they provide carbon dioxide to the atmosphere

Which organism is a consumer?

• grass

• ladybug

• pine tree

• sunflower

Which organisms use energy to make nutrients for plants?

• decomposers

• herbivores

• carnivores

• producers

Which will most likely cause a decrease in predator populations?

• an increase in prey populations

• a decrease in prey populations

• a decrease in decomposers

• an increase in producers

Which best describes an ecosystem?

• a community of plants and animals

• all the life on a specific continent

• a kingdom of animals