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WorksheetsEcosystems
Total questions: 25
Worksheet time: 13mins
An ecosystem is made of both biotic and
abiotic things. Which describes the biotic
part of the ecosystem?
plants that grow in soil
the animals that breathe oxygen
all living things in the environment
plants and animals that live in water
If you stand in the middle of an open field,
you are standing among individual
organisms, different species, populations,
and communities. What makes up one of
the populations in the field?
all organisms of the same species
the different communities in the
ecosystem
the communities that occupy the
same niche
all organisms that live in a certain
part of the field
The rainforests in South America support
many ecosystems. These ecosystems are
healthy. How does the diversity in the
rainforests help determine the health of
ecosystems?
When diversity is high, there are
more resources available.
Resources in the environment last
longer when the diversity is low.
Less diverse ecosystems have less
competition among the residents.
Areas with high diversity have
increased competition among the
residents.
Temperature, water, soil, and air are
abiotic factors in an environment. They are
not the same everywhere. What role do
abiotic factors such as these play in an
ecosystem?
They control the changes of the
seasons.
They prevent competition among
populations.
They determine which plants and
animals can live there.
They help control the effect humans
might have on the ecosystem.
When scientists talk about an ecosystem
and the type and number of animals and
plants that live in one, they are also
concerned about limiting factors. What are
limiting factors?
the rate at which the plants and
animals in an ecosystem reach
maturity
the ratio of animals that lay eggs to
those that give birth to live young
the things that are necessary to
support a population of organisms in
an area
the difference between trees that lose
their leaves in an ecosystem and
those that don’t
In a 1-meter square sample site, students
identified seven different types of
consumers and two different types of
producers. Which is the best way to
classify the consumers?
by size
by how they move
by the type of food they eat
by the type of food they make
Invasive plants compete with native plants
for resources. Which statement describes
what is likely to happen to native plants
that compete with fast-growing invasive
plants?
Their numbers will decrease.
Their numbers will stay the same.
Their numbers will increase slightly.
Their numbers will increase greatly.
Megan’s class has decided to restore an
empty lot to the way it was before the
town was built. Before they buy any plants
or soils, what must they determine?
the average annual rainfall
the factors that caused the plants to
die
what natural predators were once
nearby
which native plants used to live in the
area
Dr. Dowlen is a paleontologist. She goes
on a geology field trip to look at some
interesting rocks in her area. One place has
a large, flat surface covered with fossils. Is
it possible for Dr. Dowlen to learn about
this ancient ecosystem by marking out a
grid?
No, because there are no organisms
living there now.
No, because the area is not
completely flat and the grid would
not be accurate.
Yes, because the fossils are easy to
see just as living organisms are easy
to see.
Yes, because the fossils in the rocks
represent the organisms that once
lived there.
Darien is planting a garden alongside her
house. The space she can plant in is half in
the shade and half in the sun. What types
of plants should she plant to get the best
results in her garden?
plants that are native to the area
plants that live in filtered or
somewhat shady conditions
plants that are capable of living in
both full sun and full shade
plants that live in sun for one side of
the garden and plants that live in
shade for the other side
A developer is planning a new housing
development and is interested in protecting
crocodile habitats. The graph below shows
which habitats crocodiles prefer.
The developer wants to build where the
fewest crocodile observations have
occurred. Near which type of area is the
developer most likely to place the new
housing development?
coves
ponds
creeks
shoreline
Hurricanes that strike land are considered
natural disasters. Why are hurricanes also
considered seasonal disasters?
Hurricanes can cause major damage.
Hurricanes occur in areas all over the
country.
Hurricanes develop only during
certain times of the year.
Hurricanes strike only coastal regions
and not areas that are far inland.
Carrotwood is a fast-growing landscape
tree. Today, this tree is found in many
habitats, including dunes, coastal areas,
freshwater marshes, and riverbanks. It
crowds out native plants and competes for
light and other resources. Which term
describes the carrotwood species?
native
natural
invasive
predatory
When an environment changes, differences
between individuals can allow some plants
and animals to survive while others die or
move to new locations. Which statement
best describes how this happens?
Environmental changes allow
animals to survive, adapt, and vary.
All animals survive when the
environment changes, which leads to
their variations and adaptations.
Animals have variations that may
allow them to adapt and survive
when the environment changes.
Animals have adaptations that allow
them to survive environmental
changes, which leads to variation.
After large numbers of people moved to an
area, several species of animals and plants
became extinct. Which event most likely
led to the extinction of so many species in
a short amount of time?
natural disasters
habitat destruction
variations in the species
the change in the climate
the average area weather in an area over time
diversity
competition
climate
limiting
the variety of species in an ecosystem
diversity
competition
climate
limiting
Nonliving
biotic
abiotic
competition
limiting
Living
biotic
abiotic
competition
limiting
the struggle for resources in an ecosystem
biotic
abiotic
competition
limiting
the type of factor that determines the size of the population
biotic
abiotic
competition
limiting
a nonnative animal that moves into a new place
invasive
conservation
succession
environment
the gradual change and buildup of organisms in an environment
invasive
conservation
succession
environment
protecting ecosystems and the organisms in them
pollution
extinction
conservation
succession
litter on the ground or any harmful chemicals in the water
pollution
extinction
conservation
succession
