Ecosystems

A student makes the following observations about a blue jay while sitting outside her house. Which observation describes a blue jay interacting with the living elements in its environment?

• Observation 1

• Observation 2

• Observation 3

• Observation 4

Which of the following describes living organisms interacting with a nonliving element in its environment?

• Bees pollinate a dandelion flower

• Bacteria live in the human mouth

• Dogs drink water from a puddle

• Flies are caught and eaten by a spider

A student observes the following activities during recess one day. Which of these organisms was interacting with another living organism around the student’s school?

• cat

• ant

• lizard

• blackbird

Frogs in a pond interact with both living and nonliving components in their ecosystem. Frogs interact with nonliving components when they–

• eat swimming insects for energy.

• lay their eggs in bodies of water.

• become food for another animal.

• hide beneath plants in the pond.

The role of plants in a food web is 

• consumer
• decomposer
• predator
• producer

A squirrel makes its habitat in a forest. A company purchases the land and cuts down the trees.  What would happen?

• The squirrel population would continue to increase
• The squirrel would adapt to living there
• The squirrel population would decrease
• The tree population would increase

All food chains start with?

• Consumers

• The Sun

• Producers

• Decomposers

Decomposers do the following...

• Eat only producers

• Help breakdown dead plant and animal remains or waste

• Make their own food

• Eat only other consumers

________ get there energy from eating other organisms. 

• Producers
• Consumers
• Carnivores
• Herbivores

An organism that can make its own food is called a 

• consumer
• producer
• decomposer
• composer