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WorksheetsEcosystems
Total questions: 16
Worksheet time: 15mins
Name
Class
Date
1.
Which is an abiotic factor that most limits the number of frogs living in a pond?
a)
the color of the water
b)
the number of predators
c)
the temperature of the water
d)
the populations of producers
2.
Field mice are the primary food source for horned owls in an area. Due to a drought, many field mice left the area. Which result would this drought most likely have on the horned owls?
a)
The horned owl population will consume more field mice.
b)
Horned owls will follow the field mice to a different area.
c)
The horned owl population will increase in the area.
d)
Horned owls will change to a plant-based diet.
3.
Which population would be most affected if there is a decrease in the population of aquatic insects?
a)
elk
b)
frog
c)
moose
d)
squirrel
4.
Which species are best able to occupy the same space?
a)
those that eat the same foods
b)
those that compete for the same resources
c)
those that have a predator/prey relationship
d)
those whose needs differ significantly from each other
5.
Which best describes a way photosynthesis provides resources to animals?
a)
Photosynthesis produces carbon dioxide, decreasing the animal’s need for oxygen.
b)
Photosynthesis increases plant growth, providing places for many animals to live
c)
Photosynthesis produces excess moisture from the plants, reducing the need for a water supply.
d)
Photosynthesis increases plant growth, providing food for carnivores and eliminating the need to hunt.
6.
Deer are introduced into a grassland ecosystem and their population increases considerably. If the deer population continues to grow, which is the most likely outcome for the ecosystem?
a)
Biodiversity would decrease, and sustainability would decrease.
b)
Biodiversity would decrease, and sustainability would increase.
c)
Biodiversity would increase, and sustainability would increase.
d)
Biodiversity would increase, and sustainability would decrease.
7.
Which species would be most affected by the overfishing of Alaskan salmon?
a)
bears
b)
crayfish
c)
lobsters
d)
opossum
8.
A baby kit fox grows to become an adult with a mass of over 3.5 kg. What factor will have the greatest influence on this kit fox’s survival?
a)
the size of the fox’s ears
b)
the conditions of the fox’s habitat
c)
the average number of fox offspring
d)
the social behaviors within the fox population
9.
Below is an example of a simple food chain.
Acorn → Squirrel → Fox → Mountain Lion
What will most likely happen if squirrels are removed from the food chain?
Acorn → Squirrel → Fox → Mountain Lion
What will most likely happen if squirrels are removed from the food chain?
a)
The fox will eat acorns
b)
The fox population will decrease
c)
The trees will produce fewer acorns.
d)
The mountain lion population will increase
10.
A rainforest area is experiencing a severe drought. As a consequence, the insect population has decreased. What will the insect-eating birds most likely do as a result of the drought?
a)
stop searching for food until it begins to rain
b)
begin reproducing to increase population
c)
move to a new area to find food
d)
start the process of hibernation
11.
Which is an abiotic factor that would affect the growth of a population within an ecosystem?
a)
the availability of water
b)
the availability of producers
c)
the type of herbivores present
d)
the number of carnivores present
12.
Prairie dogs rely on underground tunnels for shelter. Which bestexplains how the prairie dog population is affected when their tunnels are disrupted and exposed?
a)
The prairie dogs are burned by the sun.
b)
The prairie dogs are exposed to predators
c)
The prairie dogs can find more food to eat in the fields
d)
The prairie dogs are forced to learn to live in trees and shrubs
13.
When an ecosystem is affected by loss of shelter, what happens to the populations in that ecosystem?
a)
They can decrease or die out
b)
They are usually not affected
c)
They can readily adapt to the changes
d)
The populations increase
14.
As populations grow, they tend to spread out into new territory. Which limiting factor is most likely to become an issue?
a)
food
b)
shelter
c)
space
d)
water
15.
Wildlife corridors are areas where wildlife can travel between two natural areas that are separated by urban development, such as highways. The development of wildlife corridors is an attempt to decrease the effect of which factor?
a)
excess predators
b)
limited shelter
c)
limited space
d)
excess water
16.
In a forest ecosystem, a food chain might look like this:
green plants → rabbit → fox → panther
If the green plants are destroyed in a forest fire, which short-term effect will this have on the organisms in this food chain?
green plants → rabbit → fox → panther
If the green plants are destroyed in a forest fire, which short-term effect will this have on the organisms in this food chain?
a)
There would be fewer rabbits for the foxes to eat.
b)
The panthers would have to begin to eat green plants.
c)
There would be an increase in the fox population
d)
There would be more green plants for the rabbits to eat
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