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WorksheetsEcosystems Test Practice
Total questions: 25
Worksheet time: 13mins
Which of the following is a biotic factor in the prairie ecosystem?
water
sunlight
soil
grass
The place where an organism lives and that provides the things the organism needs is called its
habitat
population
species
community
Which of the following is an example of a population?
the cats and dogs in your neighborhood
the bushes and grass in a park
the rocks in a rock collection
the gray wolves in a forest
The largest population that an environment can support is called its
carrying capacity.
limiting factor.
birth rate.
death rate.
A certain snake species in an ecosystem eats small rodents. If a bird species is introduced into the ecosystem that also eats small rodents, which of these will most likely increase?
Parasitism
Migration
Mutualism
Competition
The Escherichia coli that live in your intestine and help break down food are an example of which type of interaction?
competition
mutualism
parasitism
predation
All the following are examples of limiting factors EXCEPT
food
soil
space
weather conditions.
An organism’s habitat must provide all of the following EXCEPT
food
water
predators
shelter
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.
The table shown represents the relationships between different organisms.
Which relationship is parasitic?
1
2
3
4
An early winter frost preventing further growth in a tomato garden is an example of
carrying capacity.
a limiting factor.
a biotic factor.
indirect observation.
To carry out photosynthesis, algae and plants use the abiotic factors sunlight, carbon dioxide, and
soil
salt
water
bacteria
All the different populations that live together in an area make up a(n)
organism
community
species
ecosystem
Sometimes when a crocodile keeps its mouth open for a long period of time, an Egyptian plover will fly into the mouth of the crocodile. The plover will eat food stuck between the teeth of the crocodile. The crocodile benefits by having its teeth cleaned, and the plover benefits by receiving food.
What type of relationship exists between the crocodile and the plover?
Commensalism
Parasitism
Mutualism
Predation
A hawk building its nest on an arm of a saguaro cactus is an example of
commensalism
mutualism
parasitism
predation
Which of these consumers is a herbivore?
lion
deer
spider
snake
Which change would have the greatest negative impact on the survival of an owl species?
an increase in primary consumer populations
a decrease in acid rain
a decrease in size of habitat
an increase in producers
If a kestrel eats a mouse that eats grass, the kestrel is a
producer
second-level consumer.
first-level consumer.
decomposer.
In an energy pyramid, which level has the most available energy?
producer level
first-level consumer level
second-level consumer level
third-level consumer level
An organism that can make its own food is called a
consumer
decomposer.
producer
scavenger
An energy pyramid is illustrated below.
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.
Photosynthesis in plants produces
oxygen and carbon dioxide.
carbon dioxide and water.
sugar and oxygen.
How does an ecosystem benefit when leaves fall from a tree and decompose on the soil?
Nutrients are released into the soil.
Soil erosion decreases.
Carbon dioxide is absorbed by the soil.
Soil temperature decreases
