NEW
Font size
S
M
L
XL
WorksheetsWater quality
Total questions: 33
Worksheet time: 23mins
Name
Class
Date
1.
How are estuaries connected to oceanic organisms?
a)
Estuaries provide nursery Estuaries provide nursery grounds for oceanic organisms
b)
Estuaries provide sunlight for oceanic organisms.
c)
Estuaries provide primary food for oceanic organisms.
d)
Estuaries provide excess dissolved oxygen for oceanic organisms.
2.
How would excessive increases in nitrate and phosphorous concentration affect
freshwater systems?
freshwater systems?
a)
It would cause excessive algal blooms.
b)
It would cause increased dissolved oxygen.
c)
It would cause increased water clarity.
d)
It would cause extremely cold water.
3.
If your community was planning to build a new sanitary landfill, what would be the
most important environmental consideration in locating the landfill?
most important environmental consideration in locating the landfill?
a)
cost of the land
b)
location of the groundwater
c)
proximity to an industrial park
d)
accessibility to a major highway
4.
Which best explains how estuaries support plant and animal life?
a)
The dry land removes pollutants.
b)
The water provides energy for growth.
c)
The habitat areas provide nutrients and shelter.
d)
The cold temperatures decrease dissolved oxygen.
5.
Which best describes a significant benefit estuaries have on the environment?
a)
Wildlife helps protect the land from erosion in estuaries.
b)
Fishing industries thrive in and around tropical estuaries.
c)
Pollution is moved from rivers to oceans through estuaries.
d)
Coastal wetlands provide safe and ideal conditions to support animal habitats.
6.
Which best explains why estuaries are an important habitat for many marine
organisms in comparison to the open ocean?
organisms in comparison to the open ocean?
a)
There are more nutrients available in estuaries.
b)
There is less food in estuaries.
c)
There are more predators in estuaries.
d)
There is more salt available in estuaries.
7.
Which statement best describes why most of the water cycle takes place over the
oceans.
oceans.
a)
Most of Earth’s water is located in the oceans.
b)
Saltwater evaporates more quickly than freshwater.
c)
The temperatures over the oceans are warmer than over land.
d)
The temperatures over the oceans are colder than over land.
8.
Which is the greatest harm or hazard agriculture can have on a river basin?
a)
Topsoil can wash into the river.
b)
Farms can harm recreational areas along river banks.
c)
Seeds from the farm plants can grow in the river.
d)
Runoff from fertilizers and pesticides can pollute the river.
9.
Which is the best conclusion about life in estuaries?
a)
There is a diverse group of microscopic organisms.
b)
There is a limited group of microscopic organisms.
c)
There is a very diverse group of organisms.
d)
There is a limited group of fish and organisms.
10.
Which would be the impact on the environment if there were no estuaries?
a)
There would be a drought.
b)
There would be less boating, fishing and swimming.
c)
There would be an increase concentration of salt in the oceans.
d)
There would be more pollutants in the oceans.
11.
Which best describes the types of organisms found in estuaries?
a)
They can survive in salt water.! !
b)
They cannot tolerate brackish water.
c)
They tolerate both freshwater and salt water.
d)
They are only found in freshwater.
12.
What most directly affects the amount of dissolved oxygen in a body of water?
a)
pH
b)
turbidity
c)
salinity
d)
temperature
13.
What does pH measure?
a)
how acidic or basic!
b)
dissolved oxygen
c)
nutrient levels
d)
turbidity
14.
Which measurement uses clarity to test the quality of a body of water?
a)
pH
b)
turbidity
c)
bioindicators
d)
dissolved oxygen
15.
Why is freshwater in short supply on Earth?
a)
Most of it is in solid form.
b)
Most of it in the atmosphere.!
c)
Most of it is trapped underground
d)
Most of it is polluted.
16.
Of the 74% of Earth’s surface that is covered in water, which contains the most
water?
water?
a)
lakes
b)
rivers
c)
oceans
d)
streams
17.
The drain in a bathtub would represent which part of a river basin?
a)
water flowing into the ocean
b)
river rapids
c)
large river
d)
a meander
18.
Which human action would most likely increase the nutrients in an ecosystem?
a)
building a rock wall!
b)
watering a flower bed
c)
fertilizing a cornfield
d)
pulling weeds from a garden
19.
A scientist collected water quality data in a protected estuary over time. The
scientist measures a nitrate level of 6 ppm, and a dissolved oxygen level of 2 mg/L.
Which would the scientist most likely conclude about this site?
scientist measures a nitrate level of 6 ppm, and a dissolved oxygen level of 2 mg/L.
Which would the scientist most likely conclude about this site?
a)
The nitrate and oxygen levels are normal.
b)
The nitrate levels are high and the oxygen levels are low.
c)
The nitrate levels are high and the oxygen levels are healthy.
d)
The nitrate levels are low and the oxygen levels are high.
20.
Fish living in turbid water may experience which effects?
a)
gills clogging up
b)
damage to their skin
c)
increased swimming ability
d)
decreased swimming ability
21.
Which water quality indicator can be determined by measuring how light travels
through water?
through water?
a)
turbidity
b)
temperature
c)
dissolved oxygen
d)
nutrient level
22.
Which best explains why a scientist would use nets to capture and count organisms
in a river?
in a river?
a)
to measure temperature
b)
to measure biodiversity
c)
to measure turbidity
d)
to measure pH
23.
A new town is established in a remote mountain area. The citizens of the new town
are concerned about the health of themselves and their environment. Which aspect of
the community should the town develop first to meet their concerns?
are concerned about the health of themselves and their environment. Which aspect of
the community should the town develop first to meet their concerns?
a)
clean water source
b)
large hospitals
c)
fine restaurants
d)
good roads
24.
Which human activity has the most negative impact on water quality?
a)
agriculture
b)
washing clothes
c)
flushing toilets
d)
recreational boating
25.
A company has acquired land next to a local river. One month after the company
opened, the pH of the river dropped from 6.7 to 6.2, and the month after that, the pH
was 5.9. Which effect would lowering the pH most likely have on the organisms in the
river basin?
opened, the pH of the river dropped from 6.7 to 6.2, and the month after that, the pH
was 5.9. Which effect would lowering the pH most likely have on the organisms in the
river basin?
a)
All organisms would die.
b)
All organisms would thrive.
c)
The organisms would work together to raise the pH of the water.
d)
Some organisms would adapt to the new pH, while others that could not would die
26.
Which provides the largest source of dissolved oxygen in the ocean?
a)
coral reefs
b)
hydrothermal vents
c)
tidal action
d)
phytoplankton ( algal growth)
27.
Which best describes the relationship between fish and dissolved oxygen?
a)
When dissolved oxygen levels are low, fish thrive.
b)
When dissolved oxygen levels are high, fish thrive.
c)
When dissolved oxygen levels are high, fish die.
d)
When dissolved oxygen levels are low, it doesn’t hurt the fish.
28.
Which statement best describes the relationship between agricultural fertilizer runoff
and nitrates in a body of water?
and nitrates in a body of water?
a)
As runoff increases, nitrate levels increase.
b)
As runoff increases, nitrate levels decrease.
c)
As runoff decreases nitrates cause algae populations to increase.
d)
As runoff decreases, nitrate levels cause the temperature to increase.
29.
Through which practice do scientists gather information about bioindicators in a
lake?
lake?
a)
By measuring the clarity of the water.
b)
By using thermometers and pH probes to test the water.
c)
By catching organisms and making underwater observations.
d)
By introducing fertilizers and chemicals into the lake.
30.
An area that uses a reservoir is suffering from a drought. Which best explains why
water authorities would continue to release water into a river basin from the reservoir?
water authorities would continue to release water into a river basin from the reservoir?
a)
The flowing water keeps the river basin healthy.
b)
People along the river need the water for recreational activities.
c)
It will prevent flooding along the river basin in case of heavy rainfalls.
d)
The extra water is needed for irrigation on the farms bordering the river.
31.
How will high turbidity most likely affect a watershed?
a)
Water temperatures and dissolved oxygen levels will decrease.
b)
Water temperatures will increase, and dissolved oxygen levels will decrease.
c)
Water temperatures and dissolved oxygen levels will increase.
d)
Water temperatures will decrease, and dissolved oxygen levels will increase.
32.
The amount of dissolved oxygen found in a lake would be decreased by which
human activity?
human activity?
a)
boating
b)
planting trees
c)
adding nitrates
d)
swimming
33.
To represent the distribution of water on earth, a teacher filled a 2-liter bottle with
2000 mL of water. She then made a mark at the 1944 mL point. What should be written at the 1944 mL level to distinguish the type of water to that point?
2000 mL of water. She then made a mark at the 1944 mL point. What should be written at the 1944 mL level to distinguish the type of water to that point?
a)
a. Water from glaciers & icebergs
b)
b. Ground water
c)
c. Ocean water
d)
d. Water from ponds, rivers, lakes & streams
Reset
