THIS
IS
With Your
Host...
ABalanced
Ecosystems
BVocab
CNatural
Disasters
DHosts and
‘sites
ETeacher’s
Choice
100
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Why do prairie dogs survive in the
Great Plains?
A- They have driven out all the other
prairie dogs.
B- Their needs are met by that
environment.
C- Humans feed them.
D- Humans have moved to the prairie.
A 100
Why do prairie dogs survive in the
Great Plains?
B- Their needs are met by that
environment.
A 100
What describes a balanced
ecosystem?
A- There is enough water for people.
B- One type of animal and plant
depend on each other.
C- No animal or plant drives out other
animals or plants.
A 200
What describes a balanced
ecosystem?
C- No animal or plant drives out other
animals or plants.
A 200
A meadow forest has too many
squirrels. What would help balance
this ecosystem?
A- more rain that grass needs
B- more owls that eat squirrels
C- fewer owls that eat squirrels
D- more acorns for squirrels to eat
A 300
A meadow forest has too many
squirrels. What would help balance
this ecosystem?
B- more owls that eat squirrels
A 300
How do these organisms’ interactions
help balance their ecosystem?
A- Ants make homes in grass.
B- Grass and ants both need oxygen.
C- Grass makes oxygen, and animals
use it.
A 400
How do these organisms’ interactions
help balance their ecosystem?
C- Grass makes oxygen, and animals
use it.
A 400
How might a forest fire affect the
balance of a forest ecosystem?
A- It destroys sources of food and
shelter for living things.
B- It creates sources of food.
A 500
How might a forest fire affect the
balance of a forest ecosystem?
A- It destroys sources of food and
shelter for living things.
A 500
What happens when two or more
species in an ecosystem must use the
same limited resource?
A- succession
B- parasites
C- competition
D- extinction
B 100
What happens when two or more
species in an ecosystem must use the
same limited resource?
C- competition
B 100
What are organisms that live on or
in another organism, helping
themselves but hurting the other
organism?
A- host
B- parasite
C- endangered
D- producer
B 200
What are organisms that live on or
in another organism, helping
themselves but hurting the other
organism?
B- parasite
B 200
What is a gradual change from one
community of organisms to another?
A – natural disaster
B- hazardous waste
C- competition
D- succession
B 300
What is a gradual change from one
community of organisms to another?
D- succession
B 300
What are substances that are very
harmful to humans and other
organisms?
A- hazardous wastes
B- hosts
C- parasites
D- natural disasters
B 400
What are substances that are very
harmful to humans and other
organisms?
A- hazardous wastes
B 400
What is an organism that is harmed by
a parasite?
A- endangered species
B- extinct species
C- host
D- parasite
B 500
What is an organism that is harmed by
a parasite?
C- host
B 500
How would an ecosystem change if the
fish that were a main source of prey for
sharks became sick and died?
A: The number of sharks would
decrease.
B: The number of sharks would
increase.
C- The sharks would find new prey.
C 100
How would an ecosystem change if the
fish that were a main source of prey for
sharks became sick and died?
A: The number of sharks would
decrease.
C 100
Which would cause an ecosystem to
change quickly?
A- a gradual climate change
B- a lake becoming a marsh
C- a lake drying up
D- an earthquake
C 200
Which would cause an ecosystem to
change quickly?
D- an earthquake
C 200
What could scientists tell from a fish
fossil in a prairie?
A- The fish is extinct.
B- Fish one had legs to travel.
C- Fish once lived on the prairie.
D- The prairie was once a sea or
lake.
C 300
What could scientists tell from a fish
fossil in a prairie?
D- The prairie was once a sea or
lake.
C 300
DAILY
DOUBLE
C 400
What is one way a flood might affect an
ecosystem?
A- the grass will become dry
B- the grass may die
C- the grass will grow
C 400
What is one way a flood might affect an
ecosystem?
B- the grass may die
C 400
If there was a flood, which population
might increase?
A- squirrels
B- prairie dogs
C- chipmunks
D- fish
C 500
If there was a flood, which population
might increase?
D- fish
C 500
What impact does a parasite have in
an ecosystem??
A- helps the entire ecosystem
B- hurts one organism and helps
another
C- helps both the host organism and
the parasite
D- hurts the host and the parasite
D 100
What impact does a parasite have in
an ecosystem??
B- hurts one organism and helps
another
D 100
An insect called the balsam wooly
adelgid is a parasite that kills Fraser
fir trees. As the insect feeds it…
A- helps the tree.
B- harms the tree.
C- competes for food.
D 200
An insect called the balsam wooly
adelgid is a parasite that kills Fraser
fir trees. As the insect feeds it…
B- harms the tree.
D 200
If a host dies, the parasite…
A- continues to thrive.
B- might look for another host.
C- competes with other hosts.
D 300
If a host dies, the parasite…
B- might look for another host.
D 300
Which organism benefits from the
parasite-host relationship?
A- both
B- neither
C- parasite
D- host
D 400
Which organism benefits from the
parasite-host relationship?
C- parasite
D 400
What could help an organism that is
living with the parasite.
A- Removal of the parasite.
B- Nothing can help it.
C- Adding more parasites.
D- Finding a new host.
D 500
What could help an organism that is
living with the parasite.
A- Removal of the parasite.
D 500
What does this illustration show?
A- parasites and hosts
B- competition
C- succession
E 100
What does this illustration show?
C- succession
E 100
What might be a reason an animal
becomes extinct?
A- Its habitat has been destroyed.
B- It is a predator.
C- It produces oxygen.
D- It adapted to its environment.
E 200
What might be a reason an animal
becomes extinct?
A- Its habitat has been destroyed.
E 200
How can damage from strip mines be
repaired?
A- Erosion can fill the hole.
B- Mining companies can replace the soil.
C- Rain can wash the rocks away into
rivers.
E 300
How can damage from strip mines be
repaired?
B- Mining companies can replace the soil.
E 300
Why did the United States establish
national parks?
A- to make money for the national
government
B- to give Americans a chance to
see things they’ve never seen before
C- to preserve nature’s beauty and
habitats of plants and animals
E 400
Why did the United States establish
national parks?
C- to preserve nature’s beauty and
habitats of plants and animals
E 400
When does succession occur?
A- All the time
B- When an environment changes
C- When competition occurs
D- When there is a parasite
E 500
When does succession occur?
B- When an environment changes
E 500