Question

quiz: modeling matter and energy
read each question. circle the letter of the correct

1. each level in a food chain contains less

energy than the one below it because some
energy is ______________.
a. lost as heat
b. added to the system
c. consumed by carnivores
d. incorporated into biomass

1. which description fits with the term

biomass? choose the correct answer.
a. the producer - to - consumer ratio in an
ecosystem
b. the mass of all living things on earth
c. the unused material excreted as waste in an
ecosystem
d. the mass of the living and dead organisms
in a given area

Explanation:

1. In a food - chain, energy transfer is not 100% efficient. Some energy is lost as heat during metabolic processes at each trophic level, which is why each level has less energy than the one below it.
2. Biomass refers to the mass of living and dead organisms in a given area. It is an important ecological measure related to the amount of organic matter in an ecosystem.

Answer:

1. A. lost as heat
2. D. the mass of the living and dead organisms in a given area