WorksheetsBio - Biomass and Energy Pyramids
Total questions: 18
Worksheet time: 9mins
Sea otters move into the ocean bay. They eat all the sea urchins. This change will cause the
kelp to have less food
crabs to have more food
sea ducks to have less food
arctic foxes to have more food
Which chart correctly shows three of the organisms according to their roles in cycling matter in the marine food web?
Which statement best describes what will happen if the population of herbivores in the community decreases?
the population of foxes will increase
the population of hawks will increase
the population of rabbits will increase
the population of meadow plants will increase
Which statement best describes the flow of energy as it passes through the organisms in the pyramid?
energy flows through the organisms from bottom to top and increases at each level
energy flows through the organisms from bottom to top and decreases at each level
energy flows through the organisms from top to bottom and increases at each level
energy flows through the organisms from top to bottom and decreases at each level
Which energy pyramid best represents the data in the table?
Which of the following trophic levels would have the LEAST amount of available energy?
Producers
first order consumers (primary consumers)
second order consumers (secondary consumers)
third order consumers (tertiary consumers)
Which statement is true, based on the diagram?
energy flows through a community from the sun to producers and then to consumers
nutrients are available to producers, but not consumers
nutrients AND energy both come from sunlight
some trophic levels have no available energy
The available energy in this ecosystem
decreases as it flows from consumer to producer
remains constant as it flows from consumer to producer
decreases as it flows from producer to consumer
increases as it flows from producer to consumer
If animals eat plants to get energy, where do plants get their energy?
soil
water
wind
sun
What do the arrows in the food chain indicate about the flow of energy in an ecosystem?
energy is continuously recycled by the organisms in an ecosystem
energy flows in one direction in an ecosystem from producers to consumers
more of the available energy in an ecosystem is given to large animals than to small animals
organisms at the end of the food chain receive more energy than those at the beginning
If the organisms in this food chain were arranged in an ecological pyramid, which organisms would have the MOST energy available and make up MOST of the living matter in the ecosystem?
decomposer
secondary consumer
primary consumer
producer
Approximately how much energy is available to the secondary consumers in this energy pyramid?
10 kcal/m2/year
100 kcal/m2/year
1,000 kcal/m2/year
5,000 kcal/m2/year
which of the following diagrams correctly represents an energy pyramid from this web?
Which of the following energy pyramids shows the correct placement of trophic levels?
Which level of the pyramid represents the largest percentage of available energy in the ecosystem?
algae
minnows
trout
zooplankton
How is the shape of an energy pyramid related to energy flow within the ecosystem?
most energy is concentrated at the highest trophic level
energy is equally distributed among the organisms in each trophic level
only a small amount of energy is available to organisms in ocean ecosystems
only a small amount of energy from one trophic level is available to organisms at the next highest level
Which conclusion is supported by this diagram?
river otters are tertiary consumers and have the least energy avialable to them
crayfish are secondary consumers and have the most energy available to them
phytoplankton are primary producers and have the least energy available to them
zooplankton are secondary producers and have the most energy available to them
What do the sizes of the levels in the energy pyramid represent?
the amount of energy available in the organisms at each level
the amount of energy used daily by the organisms at each level
the amount of heat given off daily by the organisms at each level
the amount of energy recycled by the organisms at each level
