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WorksheetsWolves of Yellowstone Quick Check
Total questions: 11
Worksheet time: 7mins
Why were wolves absent from Yellowstone from the 1920's to 1995?
There was no prey available, so they starved.
When all the elk died, the wolves moved to Canada.
Humans hunted and killed all the wolves in Yellowstone and the surrounding area.
The wolves migrated south to Texas for a warmer climate.
Grizzly bears compete with elk for berries.
True
False
Which ecological problem was NOT caused by elk?
Few trees were on river banks
Small mammals couldn't hide from predators due to less grass and shrub cover.
Weather patterns changed and there were more severe storms.
Rivers were muddy, making it harder for fish and amphibians to survive.
Wolves keep elk moving so they don't damage rivers.
True
False
Wolves and elk sometimes hunt together for the same prey.
True
False
Grizzly bears are best described as
producers
herbivores
carnivores
omnivores
Which does NOT represent a food chain in Yellowstone National Park?
grasses --> elk --> wolves
grasses --> elk --> eagles
berry bushes --> elk --> bears
berry bushes --> elk --> rabbits
Why was the songbird population reduced by the presence of too many elk in Yellowstone?
Elk ate young trees, so birds had fewer places to nest.
Elk ate too many songbirds.
Wolves at songbirds when no elk were available.
Yellowstone elk made hunting easier for foxes by
hunting with them.
eating the tall grasses that small mammals used to hide.
chasing the wolves out of the park.
eating only small trees.
Other species that feed from an elk killed by wolves include
foxes, rabbits, and mice
bears, foxes, and beavers
bears, eagles, and coyotes
beavers, rabbits, and mice
The species that creates habitat for fish and amphibians by building dams in rivers is
otters
coyotes
elk
beavers
