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WorksheetsPopulations and Ecosystem Pre Test
Total questions: 20
Worksheet time: 17mins
Which statement BEST explains the flow of energy as it moves through the different levels?
Energy decreases as it is lost as heat to the environment.
Energy increases as it is gained from the environment.
Energy is unavailable because it is used up by the organisms at Level 1.
Energy is transferred as it is produced by organisms in the next level.
What impact do resources, such as sunlight and water, have on a forest ecosystem?
They limit the carrying capacity of the ecosystem.
They increase habitat areas for new organisms entering the ecosystem.
They decrease the number of diseases resulting from overpopulation.
They alter the rate of photosynthesis, resulting in more oxygen being produced.
Dead matter and waste would pile up without which type of organism?
decomposer
consumer
producer
A pride of lions stalks, tackles, and kills an antelope. Which is best being demonstrated?
predation
mutualism
cooperation
The nonliving physical environment of an ecosystem is the __________ component.
abiotic
biotic
diverse
living
A community of organisms living together with their physical environment is a(n)
biome
biosphere
ecosystem
atmosphere
Which is most likely to be a primary consumer?
herbivore
carnivore
omnivore
multivore
What is the maximum number of individuals an ecosystem can support?
population density
carrying capacity
succession limit
habitat maximum
Many different organisms live in Amanda’s garden. The diagram shows a simple food web of some of the organisms in her garden. Predation helps maintain the stability of an ecosystem. Which statement BEST describes how this garden ecosystem can benefit from the presence of snakes?
The snakes provide an energy source for the moles.
The snakes consume the mice best adapted to their environment.
The snakes eat moles, which allows the population of mice to increase.
The snakes keep the mice from overpopulating, which could deplete plant resources.
What is the main source of energy for the water cycle?
the Sun
fossil fuels
clouds
the ocean
An example of a population is
all trees in a forest
all maple trees in a forest
all plants in a forest
all animals in a forest
A group of different species that live together and interact in an environment are called a/an ________.
community
habitat
population
ecosystem
What is the primary role of decomposers?
chemosynthesis
nitrogen fixation
breaking down organic matter
photosynthesis
