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WorksheetsFreshwater Ecosystem Review
Total questions: 33
Worksheet time: 27mins
Name
Class
Date
1.
The zone that exists in by the shore; sunlit water
a)
tropical
b)
littoral
c)
benthic
d)
eutrophic
2.
A habitat in which the fresh water of a river meets the salt water of the ocean.
a)
estuary
b)
swamp
c)
marsh
d)
fen
3.
What is the name of the point where a river starts?
a)
Source Zone
b)
Point A
c)
Heart
d)
River Opening
4.
Sharks, dolphins, turtles, and other strong swimmers are called...
a)
plankton
b)
nekton
c)
benthos
d)
rethos
5.
____________________are wetlands that contain non-woody plants.
a)
marshes
b)
swamps
c)
estuaries
6.
This ecosystem is dominated by grasses
a)
wetlands
b)
Bogs
c)
Mangroves
d)
marshes
7.
_____________ are wetlands that are dominated by woody plants, such as trees.
a)
marshes
b)
swamps
c)
estuaries
8.
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
9.
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
10.
In a freshwater ecosystems, organisms are adapted to changes in...
a)
water depth
b)
temperature
c)
salinity
d)
all of the above
11.
Increase in nutrients; excessive plant growth
a)
Salinity
b)
runoffs
c)
eutrophication
12.
A ___________________ is the area of land that collects runoff and channels it into a main river.
a)
rill
b)
gully
c)
stream channel
d)
watershed
13.
What is a watershed?
a)
Land that collects and channels water froma small body of water to a larger body of water
b)
the shape of the land determined by elevation
c)
A natural stream of water of considerable volume
d)
a river and all its tributaries
14.
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
15.
What is the name of the point where a river ends (where river meets ocean)?
a)
Tributary
b)
Water Shed
c)
Confluence
d)
Mouth of the River
16.
Why estuaries very productive ecosystems?
a)
they constantly receive nutrients
b)
they have a large biodiversity
c)
they are close to the shore
d)
they absorb excess water
17.
Which of the following describes a function of a wetland
a)
Trap and filter pollutants
b)
add nutrients
c)
reduce flooding
d)
controls sunlight
18.
What is all the water that runs off the surface of the land and washes into rivers, streams, and other waterways called?
a)
Runoff
b)
Storm Drain
c)
Surface Water
d)
Tributary
19.
Estuaries
a)
are always saltwater ecosystems
b)
are always freshwater ecosystems
c)
are a mix of both freshwater and salt water
d)
prevent the development of salt marshes
20.
We all live in a watershed.
a)
True
b)
False
21.
Free swimming organism
a)
Nekton
b)
Plankton
c)
Benthos
d)
Decomposer
22.
Amount of dissolved salt
a)
estuary
b)
eutrophication
c)
salinity
d)
runoff
23.
Which term best describes how plants release water in the form of water vapor?
a)
evaporation
b)
precipitation
c)
transpiration
d)
condensation
24.
What is the water that seeps into the ground and fills the spaces between rocks and soil particles called?
a)
Groundwater
b)
Habitat
c)
Watershed
d)
Storm Drain
25.
Surface runoff in a watershed that empties into the Mississippi river has become polluted by sewage and fertilizers.
Which of the following environments might become polluted as a result?
I. aquatic environments downstream of the watershed
II. land environments along the banks of the river
III. environments upstream
Which of the following environments might become polluted as a result?
I. aquatic environments downstream of the watershed
II. land environments along the banks of the river
III. environments upstream
a)
II only
b)
IIII only
c)
I, II, and III
d)
I and II only
26.
What is an area of land that is covered with a shallow layer of water during some or all of the year?
a)
marsh
b)
pond
c)
swamp
d)
wetland
27.
Which part of the water cycle is occuring when warm, moist air cools and begins forming clouds?
a)
condensation
b)
evaporation
c)
precipitation
d)
transpiration
28.
Ponds are _______ and ________ than lakes?
a)
smaller and shallower
b)
fatter and larger
c)
wider and larger
d)
longer and wider
29.
What property of water allows it to be such a versatile solvent that it is often called the "universal solvent?"
a)
Purity
b)
Polarity and cohesion
c)
High heat capacity
d)
Expansion upon freezing
30.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
31.
Why can water have no net charge but have slight charges in different parts of the molecule?
a)
The oxygen end is slightly negative and the hydrogen end is slightly positive
b)
The hydrogen end is slightly negative and the oxygen end is slightly positive
c)
The hydrogen and oxygen ends change in polarity
d)
Because it is hydrophobic
32.
Which is NOT a unique property of water?
a)
Frozen water floats on liquid water.
b)
Water covers most of the Earth’s surface and retains a large amount of heat.
c)
Water molecules stick to each other through hydrogen bonds.
d)
Water cools very rapidly.
33.
Why does ice float?
a)
As water freezes, it expands and its density decreases.
b)
As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
c)
As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
d)
As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.
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