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WorksheetsHydrosphere/Oceans
Total questions: 40
Worksheet time: 20mins
Which of the following contains most of the water on Earth?
The Oceans
Watersheds
The atmosphere
Ice and Aquifers
Which would greatly reduce local water availability?
A flood
A drought
a hurricane
Which percentage represents the amount of Earth’s water that is found in oceans?
3%
71%
97%
Which percentage represents the amount of freshwater on Earth?
3%
23%
71%
Which best describes the role of the water cycle?
circulates existing water on Earth
reduces pollution in most of the water
increases usable supply of Earth’s water
Which best allows humans to utilize water as a resource?
pollution laws
local geography
energy conservation
Which most likely causes the rate of ground water movement to change?
the rock material through which the water is moving
the type of plants under which the water is moving
the time of day
Which most likely causes land that water drains into to form a watershed?
The ground is saturated or permeable.
The ground is saturated or impermeable.
The ground is unsaturated or permeable.
Which best describes the importance of an aquifer?
It holds uncontaminated ground water for human consumption.
It supplies all water for lakes and rivers
It provides water for oceans.
Where is most of Earth’s water found?
Lakes
Oceans
Streams
Where does all water on earth eventually flow?
Oceans
Pods
Rivers
Where is most freshwater located?
in lakes
In groundwater
On ice caps
How is the size of Raleigh’s population related to the availability of water in the area?
As the population increases, water availability increases.
As the population increases, water availability decreases.
As the population decreases, water availability decreases.
This diagram shows the distribution of water on Earth. Which best describes the amount of frozen water on Earth?
About 2% of Earth’s water is frozen.
About 3% of Earth’s water is frozen.
Exactly 0.9% of Earth’s water is frozen.
Which is an area of land that all drains to one place?
River
Aquifer
Reservoir
Watershed
Which best describes the process by which water from the ocean enters the atmosphere?
infiltration
precipitation
evaporation
condensation
Which would most affect the health of fish in a local pond?
The daily release of hot water into the pond from a local factory.
A storm temporarily stirring up water and sediments in the pond.
The occasional erosion of sediments into the pond from a nearby field.
A slight increase in the number of people who fish in the pond for food.
After analyzing data collected from a pond, there is a significant decrease in dissolved oxygen. Which most likely caused the decline?
an increase in minerals
an increase in sediment
an increase in algae growth
an decrease in fish population
Which is the most likely effect of too much nitrogen and phosphorus flowing into a lake?
algal blooms
greater salinity
decreased turbidity
lower temperature
Which groundwater contaminant contained in fertilizers and pesticides comes from farms?
bacteria
mercury
nitrates
sodium
Which is a bioindicator?
current
insect
rock
water
Why do biologists use indicator species?
to compare freshwater and ocean ecosystems
to count the number of organisms present
to monitor water quality and biodiversity
to analyze the dominant species
Which will best show lakes, rivers, and streams are healthy?
large amounts of algae
large amounts of nitrates
large amounts of decomposers
large amounts of dissolved oxygen
Which is the best example of a point source pollution?
runoff from fields
pesticides sprayed into the air
oil spill from a boat in the Atlantic Ocean
smoke from multiple industries in a large city
What most directly affects the amount of dissolved oxygen in a body of water?
pH
Salinity
Temperature
Turbidity
Pure water is neutral. If water is neither an acid nor a base, what is the pH of water?
0
7
10
A new golf course is built next to a river. Over the past several months, the nitrate levels of the water in the river have been increasing. Which best explains the cause of the increasing nitrate levels?
increased growth of algae
decreased biodiversity
runoff from fertilizer
Which would best indicate that water taken from a local waterway was unsafe for drinking?
cloudy water
dead fish in the water
warm temperature
In which way does a flood have the greatest impact on local water quality?
It causes aquifers to run out of water.
It cleans the water and decreases the turbidity.
It allows many foreign materials to enter the water.
It moves animals to new locations and increases biological diversity.
Which best describes the relationship between temperature and dissolved oxygen in a lake?
As temperature increases, dissolved oxygen increases.
As temperature increases, dissolved oxygen decreases.
As temperature decreases, dissolved oxygen decreases.
A change in temperature has no effect on dissolved oxygen.
Which water quality indicator can be determined by measuring how light travels through water?
turbidity
temperature
nutrient level
dissolved oxygen
As the population in an area grows, water usage increases. Eventually, water usage can outstrip the supply. Which measure to increase the amount of available water demonstrates the best stewardship of the resource?
discovering new reservoirs of water in the aquifer
reducing water usage through conservation measures
combining hydrogen with oxygen to make water
piping in water from an aquifer elsewhere
Which is most likely an example of point source pollution?
fertilizer sprayed onto a field
water runoff from a city street
a pipe flowing into a river
Which is the most important reason why findings of water quality studies need to be communicated to policy makers?
so laws can be enacted to protect the hydrosphere
so policy makers will begin to conserve water personally
so laws protecting the environment can have fewer penalties
This diagram shows pH ranges from 0 to 14, with 7 being neutral, less than 7 as acidic, and greater than 7 being alkaline (basic). How does pollution affect the pH of a stream?
When the acid rain finds its way into the stream, the pH in the stream can increase.
When the acid rain finds its way into the stream, the pH in the stream can decrease.
Pollution corresponds with decreased photosynthesis, which may cause long-term stability in pH.
Why is it necessary to have public water treatment systems?
to collect and redistribute nutrients in the water cycle
to maintain the good health of environments and organisms
to manage the runoff from erosion of topsoil and city streets
Which act of stewardship most directly impacts the water cycle?
walking to work or school
recycling aluminum soda cans
limiting shower time to 10 minutes
carpooling to work during the week
Which of the following is a non-point source of water pollution?
Oil from an oil spill in the Gulf of Mexico
Mercury dumped into a river from a nearby factory
Radioactive waste dumped into a stream
Agricultural fertilizer runoff
A mine is built near your home. What might be a concern for you?
Mining chemicals can flow into the groundwater
Road salt will runoff into groundwater
Sewage can seep into the groundwater
The mine probably will practice illegal dumping
Which source of water pollution includes oil and gasoline discharge from automobiles and storm sewer drainage?
agriculture
bacteria
sedimentation
urban runoff
