Energy Flow

1. Which of the following best describes a food chain? 

• A) A complex network of feeding relationships among various organisms

• A linear sequence of organisms where each is eaten by the next  

  
  

• A diagram showing the energy flow in an ecosystem  

    

  
  

• A list of all the organisms in a specific habitat

In a food web, what role do producers play?  

• They consume other organisms for energy  

• They decompose organic material 

• They convert sunlight into energy through photosynthesis 

• They provide nutrients to the soil  

 What is the primary source of energy for most food chains?  

• The soil  

• Producers  

• The sun

• Decomposers 

In an energy pyramid, which level typically contains the most energy?  

• The top level (tertiary consumers)  

• The middle level (secondary consumers)  

• The bottom level (producers)  

• The decomposers  

 If a food chain consists of grass, rabbits, and foxes, which organism is the primary consumer?  

• Grass

• Rabbits  

• Foxes 

• Bacteria

What happens to the energy as you move from the bottom of the energy pyramid to the top?  

• It remains constant  

• It increases  

• It decreases  

• It fluctuates  

How do decomposers fit into the food web? 

• They are at the top of the food chain  

• They recycle nutrients back into the ecosystem 

• They compete with primary consumers for food  

• They are not part of the food web  

In a food web, what role do herbivores play?  

• They are primary producers that generate energy. 

• They are primary consumers that feed on producers. 

• They are secondary consumers that feed on other consumers.  

• They are decomposers that break down dead matter. 

Which of the following best describes the relationship between food chains and food webs?  

• Food chains are more complex than food webs.

• Food webs are made up of multiple interconnected food chains.  

• Food webs only include herbivores, while food chains include all organisms.  

• Food chains and food webs are the same and can be used interchangeably. 

Write 3 examples of decomposers