In the following food chain, what would happen if all the mice became extinct?

• The snake population would increase.
• The grasshopper population would decrease.
• The grasshopper population would increase.
• The plants would stop growing.

What would be a biotic factor in the Arctic ecosystem in the picture?

• rocks
• polar bear
• ice
• water

All the biotic and abiotic factors in an area.

• ecosystem
• population
• country
• community

In the moutain river ecosystem pictured above, what would be an abiotic factor?

• trees
• swans
• grasses
• water

Organisms that help break down dead and decaying organisms in an ecosystem are called...

• decomposers
• scavengers
• predators
• consumers

What do the arrows represent in a food chain?

• The direction animals travel.
• What animals eat.
• The flow of energy 
• How animals change from one creature to another.

In the following food chain, identify the producer.

• rabbit
• snake
• grass
• lion

In a food chain, a carnivore eats...

• producers
• consumers
• producers and consumers
• decomposers

In a food chain, an herbivore eats...

• consumers
• decomposers
• producers
• producers and consumers

In a food chain, an omnivore eats...

• Consumers
• Producers
• decomposers
• Consumers and Producers