WorksheetsFreshwater and Saltwater Ecosystems
Total questions: 25
Worksheet time: 21mins
Name
Class
Date
1.
Ponds are _______ and ________ than lakes?
a)
smaller and shallower
b)
fatter and larger
c)
wider and larger
d)
longer and wider
2.
Which of the following describes a function of a wetland
a)
Trap and filter pollutants
b)
add nutrients
c)
reduce flooding
d)
controls sunlight
3.
In which of the following aquatic ecosystems are both littoral and benthic zones most likely found in ?
a)
Open ocean
b)
coral reef
c)
lake
d)
none of the above
4.
Amount of dissolved salt
a)
estuary
b)
eutrophication
c)
salinity
d)
runoff
5.
In a freshwater ecosystems, organisms are adapted to changes in...
a)
water depth
b)
temperature
c)
salinity
d)
all of the above
6.
Which of these determines what types of organisms live in water?
a)
water temperature
b)
oxygen levels of water
c)
sunlight & nutrients
d)
water temperature, oxygen levels, sunlight & nutrients
7.
The zone that exists in by the shore; sunlit water
a)
tropical
b)
littoral
c)
benthic
d)
eutrophic
8.
Microscopic organisms that float near the surface of the water are called
a)
plankton
b)
littoral
c)
benthic
9.
of or relating to living water that isn't salty
a)
desert
b)
producer
c)
freshwater
d)
predator
10.
an animal that eats both plants and animals as food
a)
omnivore
b)
niche
c)
herbivore
d)
carnivore
11.
an organism in a community that must eat to get the energy it needs
a)
herbivore
b)
consumer
c)
producer
d)
omnivore
12.
the way energy is transferred through organisms in an ecosystem
a)
biotic
b)
consumer
c)
food chain
d)
food web
13.
a community and its physical environment and how the two interact
a)
niche
b)
ecosystem
c)
estuary
d)
biome
14.
nonliving things in an ecosystem
a)
biotic
b)
abiotic
c)
estuary
d)
prey
15.
What is this called?
a)
Food Web
b)
Food Chain
c)
Abiotic Factors
16.
In the energy pyramid here, which organisms have the most energy available?
a)
Producers
b)
Carnivores
c)
Herbivores
d)
Top Predator
17.
In the energy pyramid below, which organism has the least amount of energy available?
a)
Producers
b)
Herbivores
c)
Carnivores
d)
Top Predator
18.
In the energy pyramid here, how much of the energy in the producers gets passed to the herbivores?
a)
10%
b)
20%
c)
80%
d)
90%
19.
What is this called?
a)
Food Web
b)
Food Chain
c)
Abiotic Factors
20.
What may happen if the snowshoe hare was removed from the food web pictured?
a)
The insects in the habitat would increase.
b)
The shrew population would decrease due to being only hawk food source.
c)
The willow tree population would decrease.
d)
Foxes would dies due to no food source.
21.
How many carnivores are in this food web?
a)
3
b)
6
c)
4
d)
2
22.
The rabbit in this food web would be considered a:
a)
Decomposer
b)
Producer
c)
Secondary Consumer
d)
Primary Consumer
23.
Which biome is pictured below?
a)
freshwater
b)
wetland
c)
coral reef
d)
ocean
24.
Which of these is the largest source of salt water?
a)
Rivers
b)
Lakes
c)
Oceans
d)
Streams
25.
All of these can be sources of fresh water EXCEPT -
a)
rivers
b)
oceans
c)
lakes
d)
streams
100 %
