WorksheetsTCI U1: Healthy and Unhealthy Ecosystems: Lesson 6
Total questions: 12
Worksheet time: 21mins
A creature that is captured and eaten is ____.
a producer
a predator
the prey
a consumer
In a healthy environment, the number of ____
predators is very small.
predators is greater than prey.
predators and prey are balanced.
prey is greater than predators.
Why do scientists study the ecosystem of Isle Royale?
Nothing can enter or leave it.
The animals have plenty to eat.
It si in the largest of the Great Lakes.
It is home to many types of animals.
If the number of moose on Isle Royale decreases.
The wolves begin to raise offspring.
The number of wolves increases.
The number of wolves decreases.
The amount of fir trees decreases.
_____can cause an environment to be unhealthy.
Too many of one type of organism
Too few of one type of organism
Death of one type of organism
All the above
A lot of algae growing in a pond could be an example of
a healthy food chain.
a healthy environment.
an unhealthy environment.
excess food for consumers.
Which of the following nonliving parts of an ecosystem can change the living parts?
increase in insects
change in weather
death of plant live
decrease in prey
How would the death of a first level consumer, like tadpoles, change the ecosystem?
Second level consumers would decrease.
the environment would not change.
Higher level consumers would increase.
Plants that produce food would decrease.
The rise of ticks in Isle Royale caused the amount of
moose to decrease and mount of wolves to decrease.
moose to increase and the amount o wolves to decrease.
moose to decrease and the amount of wolves to increase.
moose to increase and the amount of wolves to increase.
In all ecosystems, _______
all parts affect each other.
the needs of all species are met.
all species have enough to survive.
there is plenty of food and resources.
Algea--->tadpole--->fish--->turtle--->heron. In thismodel food chain which ones are predators?
algea turtle and heron
fish, turtle and tadpole
fish, turtle and heron
tadpole, algae, turtle
when bacteria use up the oxygen in the water for decomposing, _______ are affected because they need the oxygen.
carbon dioxide
birds
fish
water
