Worksheets5th Grade Science Unit 4 Lesson 2
Total questions: 18
Worksheet time: 18mins
How do the animals in the photograph affect their ecosystem?
They take down trees that other organisms might need for shelter.
They build dams that change the flow of streams and rivers.
They block sunlight needed by native plant species.
They use up the supply of oxygen in the water.
Which of the following is NOT a way that trees affect their ecosystems?
releasing oxygen into the atmosphere
moving soil as root growth occurs
absorbing water from the soil
reducing the number of insects by eating them
Which of the following affects the environment by making holes in tree trunks to capture insects for food?
humans
squirrels
woodpeckers
coral
Which of the following affects the environment by growing reef structures, which provide food and habitats for many types of organisms?
zebras
coral
humans
vines
Which of the following affects the environment by changing existing ecosystems by building roads, schools, and homes?
humans
chickens
beavers
oak trees
Which of the following affects the environment by moving and storing nuts, leading to trees growing in new locations?
large-mouth bass
Burmese pythons
squirrels
flowering plants
Which of these describe an invasive species? Choose all that apply.
better able to compete for resources than native species
any species that is added to a new ecosystem
usually dies out rapidly in its new ecosystem
tends to spread rapidly and take over ecosystems
usually lacks predators in the new ecosystem
Which of these describes how this invasive species, Brazilian elodea, affects other plants in the ecosystems it enters? Choose all that apply.
It crowds out other plants.
It produces resources needed by other plants.
It increases the number of native plants in the ecosystem.
It blocks sunlight from plants that live deeper in the water.
Moving soil as roots grow, moving materials to build homes.
This effect is caused by plants only.
This effect is caused by animals only.
This effect is caused by plants and animals.
using water resources
This effect is caused by plants only.
This effect is caused by animals only.
This effect is caused by plants and animals.
adding and removing materials from the air
This effect is caused by plants only.
This effect is caused by animals only.
This effect is caused by plants and animals.
Species that are newly added to an ecosystem are called ____ species.
native
introduced
original
mobile
If a newly added species can better compete than the species that were already part of the ecosystem, it could become an ______ species.
native
original
invasive
introduced
Adding a new species to an ecosystem to control another species ______ the best solution.
is always
is not usually
A ____ species is established in an ecosystem.
native
invasive
A ___ upsets the balance in an ecosystem.
native
invasive
A ____ species may have population explosions.
native
invasive
A ____ species is better able that other species to compete for resources in an ecosystem.
native
invasive
