new ecosystem review

Which organism is a producer? 

• frog 
• mushroom 
• grass 
• lizard 

Which is most responsible for recycling dead plants and animals in an ecosystem? 

• water 
• bacteria 
• fish
• insects

How would the woodpecker population in a forest area most likely be affected if a housing development is built in that area?

• They would produce more offspring. 
• They would change the color of their feathers. 
• They would experience a decrease in available food. 
• They would experience a decrease in competition. 

In a grassland ecosystem, if the population of eagles suddenly decreased, what will most likely be the effect on the rest of the ecosystem? 

• The ecosystem will become overpopulated with snakes.
• There will be a decrease in the population of snakes in the ecosystem. 
• The nutrition of the soil in the ecosystem will decrease. 
• More types of plants will begin growing in the ecosystem. 

Which is an example of a decomposer?

• a hawk 
• a mouse
• a flower 
• a mushroom

As more people have moved to the beach, the sea turtle population has decreased. Which is most likely the cause of this decrease? 

• tropical storms 
• increase in predators 
• habitat loss 
• warmer temperatures 

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 

A simple food chain includes hawks, lizards, and insects. Which will most likely happen to the lizard and hawk populations if a pesticide is sprayed to kill the insects, and the lizard and hawk populations cannot find other food in this ecosystem? 

• Both the lizard population and the hawk population will increase.  
• Both the lizard population and the hawk population will decrease. 
• The lizard population will increase, but the hawk population will decrease. 
• The lizard population will decrease, but the hawk population will increase. 

the natural home of an animal

• environment
• ecosystem
• habitat
• home

an organism that makes its own food

• producer
• consumer
• decomposer