Flow of energy 2

• Producer
• Primary Consumer
• Autotroph
• Decomposer

• Producer
• Primary Consumer
• Secondary Consumer
• Decomposer

Which of the following is NOT a heterotroph?

• grass
• fungus
• shark
• sea urchin

What percentage of energy is passed on to each trophic level?

• 10%
• 50%
• 90%
• 100%

The arrows in a food chain or web represent ...

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

The owl and weasel compete for which organism?

• Hawk
• Spider
• Grasshopper
• Shrew

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

• There would be a decrease in the small bird population.
• There would be a decrease in the grass/flowers population.
• There would be a decrease in the mice population.
• There would be an increase in the grass/flowers population.

Why is some energy not passed on to the next trophic level?

• The organisms at each level use about 90% of the available energy to live.

• The statement is NOT true. All energy IS passed from one trophic level to the next.

• The organisms at each level use about 10% of the available energy to live.

• Most energy is absorbed by the soil instead.

The diagram represents a pyramid of energy in an ecosystem.  Which level would most likely contain organisms that can photosynthesize?

• A
• B
• C
• D

If there are 100 kcal of energy available in the producers, how much energy would be available to the herbivores?

• 10 Kcal
• 1 Kcal
• 100 Kcal
• 1000 Kcal