Ecosystem

Look at the diagram of the food web. The arrows means “eaten by.”

What will happen if the number of snakes goes down?

• The owl will eat the grass

• The number of frogs will go down

• The hawk and owl will have less food

• The number of mice and grasshoppers will go up.

What are the 3 R's when taking care of our environment?

• restore, rocks, rebellion
• reduce, reuse, recycle
• retake, recycle, recap
• reteach, restore, recycle

An organism that produces food by photosynthesis.

• Producers

• Consumers

• Photosynthesis

• Saprophytism

The main source of energy for producers.

• The sun

• Water

• Glucose

• Carbon dioxide

A consumer that eats only plants.

• omnivore

• herbivore

• carnivore

• predator

An organism that eats other organisms.

• host

• parasite

• consumer

• decomposer

A consumer that eats only animals.

• scavenger

• carnivore

• herbivore

• omnivore

An organism that is killed and eaten by another organism.

• consumer

• decomposer

• prey

• host

An arrangement of interrelated food chains illustrating the flow of energy between interdependent organisms.

• predator

• food web

• ecosystem

• food chain

Explain the flow of energy in this food chain (who passes energy to who).

• The hawk gives energy to the snake. The snake gives energy to the mouse. The mouse gives energy to the grasshopper who gives energy to the grass.

• The mouse gives energy to the hawk. The snake gives energy to the grasshopper. The grass gives energy to the snake.

• The grass gives energy to the grasshopper. The grasshopper gives energy to the mouse. The mouse gives energy to the snake who gives energy to the hawk.