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WorksheetsChanges in Ecosystems
Total questions: 20
Worksheet time: 3600secs
Name
Class
Date
1.
Which of the following would have a negative impact on an ecosystem
a)
constructing highways
b)
planting trees
c)
recycling paper
2.
A habitat is the place where an animal lives. Which animal's habitat is probably not in the desert?
a)
an insect
b)
lizard
c)
desert rat
d)
bear
3.
How does a bird "change its environment" to meet its NEEDS?
a)
builds a nest
b)
flies around
c)
catches bugs
d)
looks for something to eat
4.
6. A squirrel makes a change to its environment when it —
a)
climbs a tree
b)
digs a hole to bury an acorn
c)
collects acorns
d)
jumps from tree to tree
5.
What do scientist call organisms that are not native to an ecosystem and cause harm to native organisms?
a)
native plants
b)
invaders
c)
invasive species
d)
natural species
6.
Which of the following activities has a positive effect on the environment?
a)
recycling
b)
deforestation
c)
pollution
7.
When a certain population becomes so dense that it harms or changes the quality of life in that environment, we have...
a)
a population
b)
overpopulation
c)
pollution
8.
A ______________ is the place where an organism lives.
a)
adaptation
b)
equilibrium
c)
population
d)
habitat
9.
_____________ are geographical areas that contain different organisms suited for that environment.
a)
ecosystem
b)
habitat
c)
population
d)
biomes
10.
An ______________ is a system made up of all the biotic and abiotic factors in an area and all the interactions among them.
a)
ecosystem
b)
habitat
c)
population
d)
biodiversity
11.
What is the main difference between a primary and secondary succession?
a)
The climax of primary succession is pine forest.
b)
Primary succession begins with bare rock.
c)
Secondary succession begins with mosses and lichens.
d)
Secondary succession includes frequent fires.
12.
Which is NOT an example of a natural environmental change?
a)
a beaver dam
b)
a hurricane
c)
a volcanic eruption
d)
a housing development
13.
When the last member of a species dies, the species becomes
a)
extinct
b)
endangered
c)
threatened
d)
dead
14.
What is niche?
a)
The job an animal has within its population.
b)
The job a plant has in its community.
15.
An organism that feeds on other organisms
a)
consumer
b)
producer
c)
decomposer
d)
organism
16.
A simple organism that breaks down dead organisms and waste, returning important nutrients to the environment
a)
inorganic
b)
decomposer
c)
organism
d)
consumer
17.
A living thing
a)
organism
b)
organic
c)
decomposer
d)
producer
18.
All the members of a specices living in a particular area at a particular time.
a)
organic
b)
producer
c)
population
d)
consumer
19.
Organism that makes its own food
a)
organism
b)
product
c)
decomposer
d)
producer
20.
Which organism do the owl and the weasel compete for in the food web?
a)
Hawk
b)
Spider
c)
Grasshopper
d)
Shrew
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