Food chain is a sequence of organisms where nutrients and energy is transferred from one organism to the other. Each step or level of the food chain forms a trophic level. A food chain only follows just one path as animals find food. A hawk eats a snake, which has eaten a frog, which has eaten a grasshopper, which has eaten grass. A food web on the other hand shows the many different paths plants and animals are connected. As an example, hawk might also eat a mouse, a squirrel, a frog or some other animal. The snake may eat a beetle, a caterpillar, or some other animal. And so on for all the other animals in the food chain. A food web is several food chains connected together.
1. In the image given above, which organism does not belong to the third trophic level?
a. Frog
b. Hawk
c. Thrush
d. Vole
2. Organisms of the first trophic level belong to _____.
a. producers
b. consumers
c. decomposers
d. hetrotrophs
3. What are animals that eat herbivores called?
a. producers
b. Primary Consumers
c. Secondary Consumers
d. Tertiary Consumers
4. What is the average value of the amount of organic matter that is present at each step and reaches the next level of consumers?
a. 5%
b. 28%
c. 2.9%
d. 10%
5. What percentage of energy do green plants capture to convert it into food energy?
a. 1%
b. 25%
c. 8%
d. 92%
