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WorksheetsChapter 4 Ecosystems
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
Biodiversity refers to
a)
extinct species
b)
the variety of species on Earth
c)
nonrenewable resources
d)
the rate of species decline
2.
When taken to a new habitat, non-native plants often threaten native plants of the new habitat. Why do they do this?
a)
Non-native plants are able to mutate rapidly
b)
Non-native plants cause native animals to relocate
c)
Non-native plants are able to be used for medicine
d)
Non-native plants compete with native plants for resources
3.
What makes a species invasive?
a)
Moving to a new ecosystem and taking resources from natives
b)
Not having papers
c)
Species that can't adapt
d)
Plants that take up too much space
4.
What kind of organisms can become invasive?
a)
Lions, Tigers, Bears
b)
Plants, Animals, or Pathogens
c)
Animals
d)
Plants
5.
If a blue catfish is introduced and eats the large fish who eat the smaller fish, what will happen to the population of the smaller fish?
a)
Increase
b)
Decrease
c)
Stay the same
d)
No affect on smaller fish
6.
Which of the following is a key characteristic of most invasive species?
a)
Ability to breathe in the air & in the water
b)
Large, sharp teeth
c)
Produce many offspring
d)
Is a top predator
7.
What is a native specie?
a)
A specie that is local and has lived in the same place
b)
A specie who has come from another state or country
c)
A specie that has no "home" and travels for its whole life
d)
None of the above
8.
The lack of natural predators makes populations of invasive species unmanageable?
a)
true
b)
false
9.
Invasive species have a negative impact on...
a)
the ecosystem
b)
the economy
c)
Both the ecosystem and the economy
d)
None of these
10.
What do invasive species do to the habitat they move into? (paragraph 2)
a)
crowd out local plants and animals
b)
eat all the mice and deer
c)
create a food chain
11.
What's one EFFECT of pythons invading the Everglades?
a)
the number of small mammals, like mice, are decreasing
b)
the number of white-tailed deer is increasing
c)
pythons can grow to be 18 feet long
d)
Timer (with selected value) 30 seconds
12.
Which of the following is NOT the effect of invasive species?
a)
Causing extinction of native species
b)
Increasing biodiversity
c)
Disruptions of ecosystem
d)
Competing with native organisms for limited resources
13.
When you consume an organism, you only receive 10% of the energy, but how much of the toxins do you receive?
a)
All of the toxins
b)
10% toxins
c)
1% toxins
d)
None of the toxins
14.
What are examples of toxins? (choose all that apply)
a)
insecticides
b)
salt
c)
water
15.
In which organism would biomagnification be the most concentrated?
a)
grass
b)
rabbit
c)
snake
d)
hawk
16.
Which organism would have the most bioaccumulation?
a)
eucalyptus tree
b)
wombats
c)
kookaburras
d)
koalas
17.
In what year were the most toxins present in smallmouth bass?
a)
2000
b)
2002
c)
2004
d)
2005
18.
DDT eventually show up in higher-level consumers (i.e. as you go up the food chain) due to
a)
biomagnification
b)
climate change
c)
habitat destruction
d)
bioaccumulation
19.
Toxin concentrations _____________ as you go up the food chain.
a)
do not change
b)
increase
c)
decrease
20.
Which consumer is the most affected by toxins like DDT or mercury?
a)
Primary Consumer
b)
Secondary Consumer
c)
Apex Predator
d)
Producers
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