TROPHIC LEVEL WORKSHEET
1. Visit the following websites and read the information about trophic
pyramids and food webs:
http://www.botany.uwc.ac.za/sci_ed/grade10/ecology/trophics/troph.htm
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/F/FoodChains.html
2. Define the following terms:
a) Biomass –
b) Food Web –
c) Producer –
d) Consumer –
3. Read about the transfer of energy through the trophic levels and
answer the following questions:
A) What is the original source of energy for most living organisms?
B) Why is the energy transfer between trophic levels not even close to
100% efficient?
C) Is there more energy stored in the producer level or consumer
levels? Why?
D) What would require more land to grow food crops? If all humans
ate only vegetables or ate only meat. Explain.
4. Place each organism into the proper trophic level:
Tertiary Consumers
Secondary Consumers
Primary Consumers
Producers