What is a trophic level?
The position of an organism in a food chain, web or pyramid.
The amount of food consumed by an organism in a food chain, food web or pyramid.
The size of a bar drawn in a pyramid of numbers or biomass.
Which is the producer in this food chain? grass → cow → human
Grass
Cow
Human
What is a primary consumer?
A plant that uses sunlight for photosynthesis.
An animal that eats plants.
An animal that eats other animals.
Which is the tertiary consumer in this food chain? tree → caterpillar →shrew → owl
Caterpillar
Shrew
Owl
Tree
About what percentage of energy is transferred from one trophic level to the next?
10%
50%
90%
Which of the following is a reason why all the energy in one trophic level cannot be passed to the next level?
Animals cannot eat and digest all of a plant or animal.
The pyramid of biomass gets smaller.
Energy is never used for movement.
What is transferred along a food chain?
Energy only.
Substances only.
Energy and substances.
What is the original source of energy for almost all organisms?
The sun
The producer