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WorksheetsU1L3 Quizizz (Changing Ecosystems)
Total questions: 18
Worksheet time: 9mins
A dynamic system is a system that
never changes.
changes constantly.
only changes suddenly.
changes in unpredictable ways.
Which of these is a gradual change in an ecosystem?
A rainstorm floods a riverbank.
An earthquake displaces a family of squirrels.
A pond dries up over the course of a hundred years.
Fish are removed from a pond over the course of ten days.
Gradual changes to ecosystems
never happen.
can happen in predictable ways.
only happen when the weather is nice
can disrupt the long term development of a species.
Ecological succession is
the way an ecosystem interacts with other ecosystems.
a term for the different kinds of terrestrial ecosystems.
a rating for how successfully a species can stay in an ecosystem.
progressive change of an ecosystem through predictable stages.
Why might it take hundreds to thousands of years for a pond to transform into a forest?
Large changes to an ecosystem can take a lot of time.
Living organisms in pond ecosystems prevent trees from growing.
Ecosystems only change when the needs of living resources change.
It takes a long time for humans to drain the water from a pond and plant trees instead.
Which of these does NOT describe a catastrophic event?
A. A hurricane destroys a pond ecosystem.
B. A fox’s den is covered in ash after a wildfire.
C. An oil rig dumps several tons of oil into the ocean.
D. A beaver’s dam slows the water flowing in a stream over the course of several years.
What do scientists observe about how prairie dogs interact with other parts of their ecosystem?
Scientists discovered that fewer prairie dogs meant there was an absence of other species.
Scientists discovered that the number of prairie dogs makes no difference to other species.
Scientists discovered that more prairie dogs meant there was an absence of all other species.
Scientists discovered that fewer prairie dogs meant there was an increase of all other species.
Evidence is
notes that scientists gather after years of study.
the process by which scientists decide which ecosystems to study.
information scientists obtain through observation or experimentation.
the time it takes for an ecosystem to fully repair itself after a catastrophic event.
Which of these is a way that prairie dog populations help other species?
Prairie dogs act as prey for bison.
Prairie dog burrows provide safe shelter for snakes.
Prairie dogs act as transport for insects such as ants and spiders.
Prairie dogs keep grass populations low, making it easier for other species to hunt.
Changes in the living parts of an ecosystem can cause
catastrophic events to occur at a higher rate.
gradual changes in the ecosystem to completely stop.
populations of different species to grow at the same rate.
changes in the characteristics and available resources in the ecosystem.
How would a change in a non-living resource, such as water supply, likely affect the living organisms that depend on it?
A change in non-living resources will likely change the physical color of living organisms.
A change in non-living resources will likely change the population size of living organisms.
A change in non-living resources will likely change the weather patterns experienced by living organisms.
A change in non-living resources is not likely to affect the living organisms that depend on them.
How might the trees a beaver cuts down to build its dam affect an ecosystem?
The trees a beaver takes prevents plants and trees from growing.
The trees a beaver takes causes more birds to nest in the area.
The trees a beaver takes has no effect on the surrounding ecosystem.
The trees a beaver takes expose plants on the forest floor to more sunlight.
What is likely to happen upstream from a beaver’s dam?
a decrease in the population of fish
flooding and the creation of a pond
a decrease in the amount of water available in that area
a sudden decrease in the populations of smaller plants
What is likely to happen downstream from a beaver’s dam?
insect populations disappear
more water is available for plants
the amount of oxygen in the area decreases
the number of non-living things in an area decreases
A beaver’s behavior is evidence that
non-living resources can harm living resources.
organisms affect non-living resources.
living organisms are not dependent on non-living resources.
beavers are the most valuable organisms in their ecosystems.
Any system that is characterized by constant change
evidence
ecological succession
dynamic system
ecosystem
Information obtained by observation or experimentation
ecosystem
evidence
dynamic system
ecological succession
The predictable way that ecosystems change from one type to another over time
ecological succession
ecosystem
dynamic system
evidence
