Energy Flow in Ecosystems

What is the primary source of energy for the ecosystem pictured above?

• Grass and Green plants

• Hawks and Deer

• Tadpoles and Fish

• Sun

In this food web, which of the following organisms eats the largest variety of different producers?

• Mouse

• Grasshopper

• Dragonfly

• Butterfly

The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.
• It shows how sunlight flows within an ecosystem.
• They show what direction the energy is flowing between organisms. 
• They represent how water is transferred within a habitat.

An energy pyramid represents what?

• How much sunlight is available for the ecosystem to use. 
• How much energy a particular organism needs. 
• How much energy is needed to build a pyramid. 
• The amount of energy available to the next 'feeder' in a food web.

How much energy is available to be passed on to the next level in a food web?

• 100%

• 10%

• 50%

• 75%

Consumers obtain energy by

• eating other organisms
• eating plants
• photosynthesis
• nitrogen

A __________________ is a type of animal that hunts other animals to eat. 

• prey
• herbivore
• predator
• producer

Grass is considered a ...

• consumer
• producer
• decomposer
• composers

In this Food Web Pyramid Which type of consumer gets only 10% of the energy stored in plants?

• Herbivore
• Carnivore
• Omnivore
• Secondary Consumer

Which process do plants use to turn sunlight into food energy?

• photosynthesis

• cellular respiration

• transpiration

• evaporation