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Q 1/63
Score 0
Which of these contain most of Earth's water?
30
rivers
oceans
lakes
glaciers
Q 2/63
Score 0
Where is most of the freshwater on Earth located?
30
in the oceans
in polar ice and glaciers
under the ground
in rivers, streams, and lakes
Q 3/63
Score 0
A rock layer that collects and stores water is called?
30
a hydrosphere
a glacier
an aquifer
an estuary
Q 4/63
Score 0
An area of land that drains into a river or lake is called
30
a habitat
a watershed
an ecosystem
a wetland
Q 5/63
Score 0
Pamlico Sound is an estuary because it is
30
an area fed by several rivers
an area that is protected by land on both sides
an area that many watersheds drain into
an area where freshwater mixes with saltwater
Q 6/63
Score 0
An ocean basin is
30
the layer of the ocean closest to the surface
a continuous body of water that covers 70% of Earth's surface
a part of Earth's surface covered by ocean water
a deep trench along the floor of the ocean
Q 7/63
Score 0
What is the source of most of the salt in the ocean
30
fish
wind
human activities
rocks on land
Q 8/63
Score 0
Which is NOT a threat to living ocean resources?
30
pollution
overfishing
oil spills
evaporation
Q 9/63
Score 0
Which are the main producers in the ocean?
30
algae and other microscopic organisms
seaweed growing on the ocean floor
microorganisms living near vents in the ocean floor
sea grasses growing on the ocean floor
Q 10/63
Score 0
Producers in the upper part of the ocean get nutrients from
30
their roots, which grow into the ocean floor
materials brought to the surface by upwellings
river water that washes out to the ocean
dead organisms floating in the water
Q 11/63
Score 0
How are estuaries different from lakes or the ocean?
30
estuaries contain both saltwater and freshwater
estuaries contain only salt water
estuaries are not bodies of water
estuaries contain only freshwater
Q 12/63
Score 0
An example of non-point source of pollution
30
oil from a leaking underground tank
fertilizer runoff from lawns
chemicals released from a paper mill
wastewater from a leaking pipe
Q 13/63
Score 0
A clear example of point-source pollution is
30
feedlots wastes in a river
oil spilling from a supertanker
trash floating in ocean water
salts from irrigation
Q 14/63
Score 0
What is a possible effect of high nutrient levels in water systems?
30
hotter water
healthier fish
algal bloom
fewer algae
Q 15/63
Score 0
Which of the following occurs when algae decompose in the ocean?
30
the ocean water releases excess oxygen into the air
decomposers add oxygen to the ocean water
decomposers remove oxygen from the water into the air
decomposers at the ocean's surface remove oxygen from the air
Q 16/63
Score 0
For what types of water does the Clean Water Act set water quality standards?
30
surface water
all US waters
groundwater
ocean water
Q 17/63
Score 0
Which of the following are indicators of a healthy water source?
30
high nitrates, high pH, and low temperature
High turbidity, high dissolved oxygen, and high temperature
low pH, high nitrates, and low dissolved oxygen
low temperatures, high dissolved oxygen and neutral pH
Q 18/63
Score 0
What is pollution?
30
a decrease in oxygen in water
an increase in Earth's temperature
a sudden growth of algae in a pond
the release of harmful substances into the environment
Q 19/63
Score 0
A body of water that has a high turbidity is
30
clear
basic
acidic
cloudy
Q 20/63
Score 0
Which of the following water pH levels is best for marine organism?
30
8.0
1.0
3.5
11.5
Q 21/63
Score 0
Which best describes a bioindicator
30
a species that has been introduced to an ecosystem
a species that can adapt to a variety of conditions
a species that depends on specific conditions to survive
a species that has a short life span
Q 22/63
Score 0
How can the atmosphere be considered part of the hydrosphere?
30
it traps pollutants that would otherwise harm the Earth
it contains the oxygen necessary for life on Earth
it is a source of water
it blocks ultraviolet rays from the sun
Q 23/63
Score 0
Which best describes a non-point source of pollution?
30
chemical spill in a river next to a manufacturing complex
liquid fertilizer flowing from a barrel into a stream
accumulation of oil in a stream next to a gasoline station
runoff from a road into a nearby stream
Q 24/63
Score 0
Which statement BEST explains the reason some insects can walk across the surface of a lake?
30
water is a polar molecule and its cohesiveness causes high surface tension
water is a polar molecule and its adhesiveness causes good capillary action
water is a non-polar molecule, and its cohesiveness causes good capillary action
water is a non-polar molecule, and its high adhesiveness provides high surface tension
Q 25/63
Score 0
Which interaction illustrates a terrestrial-aquatic food web relationship?
30
a fish eating plankton in the ocean
a turtle burying eggs in the sand
a bear eating fish in a river
a bird laying eggs in a nest in a tree
Q 26/63
Score 0
Water temperature and depth of water are factors that can determine the type of organisms that live in different areas of the ocean. Which other factor is most important?
30
sunlight
tides
currents
sediments
Q 27/63
Score 0
What is one way scientists analyze the health of a river?
30
by measuring the speed at which the river flows
by measuring the distance the river travels to reach an ocean
by measuring its dissolved oxygen content
by measuring its depth
Q 28/63
Score 0
Which example best represents an interconnection between an aquatic food web and a terrestrial food web?
30
snakes eat bird eggs
bats eat mosquitoes
fish eat insects that land on the surface of a pond
mountain lions catch and eat deer
Q 29/63
Score 0
What is one way the government of the United States attempts to reduce pollution in the oceans
30
enforce laws limiting trash dumping
discontinue sewage treatment programs
create new desalination plants
increase oil and gasoline production
Q 30/63
Score 0
The population density of marine life is greater along the shorelines of the ocean of the ocean than farther out in the deep waters of the oceans. Which statement provides the best reason for this situation?
30
Coastal waters are less polluted than the deeper waters of the ocean
The shallow waters have fewer predators
Ocean currents prevent many smaller marine organisms
There are more nutrients in shallow waters
Q 31/63
Score 0
An algae bloom in a water system is most likely caused by
30
high oxygen levels in the water
increase use of fossil fuels
decrease in the fish population
large amount of nitrates in water
Q 32/63
Score 0
One dry summer, a large number of fish suddenly died in a shallow river. Which is the BEST explanation for this fish kill?
30
fertilizer caused too many algae to grow, and the fish died from overeating
the water became too warm to hold enough dissolved oxygen for the fish
the water became too cold, stressing the fish so that they became sick and died
heavy rains washed soil into the river, making it too muddy for the fish
Q 33/63
Score 0
Which of these is most likely to have a harmful effect on water quality?
30
treating sewage to kill pathogens
letting pollutants wash out to sea
having water laws and regulations
having chemical indicators to check water quality
Q 34/63
Score 0
What are the most likely effects of ocean upwelling?
30
increased water temperature and decreased dissolved oxygen
increased pollution and decreased animal and plant populations
increased nutrients and increased populations of algae and fish
decreased photosynthesis and increased chemosynthesis
Q 35/63
Score 0
Wilson Creek, a National Wild and Scenic River, flows through the Wilson Creek Gorge before it joins the Johns River. Which term best describes Wilson Creek?
30
watershed
tributary
estuary
aquifer
Q 36/63
Score 0
Which factors are most characteristic of a healthy body of water?
30
high pH and low dissolved oxygen
low turbidity and high dissolved oxygen
low salinity and high turbidity
high temperature and large quantities of algae
Q 37/63
Score 0
Which organism is most likely to be found in an estuary environment?
30
whale
crab
dolphin
jellyfish
Q 38/63
Score 0
If a body of water has low levels of dissolved oxygen, what can MOST LIKELY be concluded?
30
water temperature is high
water has a high salinity
water has a high turbidity
water has a low pH
Q 39/63
Score 0
Phosphates help detergents make clothes whiter and clean dishes better. Which is the best reason why phosphates have been removed from detergents?
30
to improve turbidity levels
to improve the health of humans
to prevent pollution of aquifers
to prevent algal blooms
Q 40/63
Score 0
Which of these is NOT a body of freshwater
30
estuary
river
lake
stream
Q 41/63
Score 0
About what percentage of Earth's surface is covered with water?
30
70%
90%
30%
50%
Q 42/63
Score 0
What is the relationship between water and temperature and dissolved oxygen?
30
as water temperature goes up, the amount of dissolved oxygen increases
cold water can contain more dissolved oxygen than warm water can
the amount of dissolved oxygen decrease as water temperature decreases
water temperature has no effect on the amount of dissolved oxygen
Q 43/63
Score 0
Which is a biological indicator of water quality?
30
salinity
pH level
turbidity
diversity of insect larvae
Q 44/63
Score 0
Which best describes the area that separates water flowing into a river?
30
watershed
ocean
estuary
aquifer
Q 45/63
Score 0
What is the most immediate effect of high levels of nitrates and phosphates in a body of water?
30
the pH increases
the population of algae increases
the levels of dissolved oxygen decreases
the fish population decreases
Q 46/63
Score 0
What is an indicator that a lake is healthy?
30
high number of bio-indicators
a pH of 3.5
low number of bio-indicators
a pH of 10.5
Q 47/63
Score 0
Why are faster moving rivers more likely to contain higher concentrations of dissolved oxygen than slower moving rivers
30
faster moving water has a lower turbidity than slower moving water
faster moving water is warmer than slower moving water
faster moving water traps more air bubbles than slower moving water
faster moving water combines more easily with minerals than does slower moving water
Q 48/63
Score 0
Which best explains why most of Earth's freshwater is NOT used for drinking?
30
it is too deep underground
it is frozen in glaciers and ice caps
it is too polluted
it is used for agriculture
Q 49/63
Score 0
Which is the correct statement regarding estuaries?
30
it prevents saltwater from entering a river
acts as a filtering system to remove some pollutants from water runoff
it supplies freshwater to lakes
it supplies all of the minerals that make ocean water salty
Q 50/63
Score 0
Which form of water has the highest density?
30
cold water
water vapor
warm water
ice
Q 51/63
Score 0
Which best explains the importance of dissolved gases in the ocean?
30
they help control pollution
they help provide oxygen for aquatic animals
they help maintain a constant water temperature
they help maintain constant levels of salinity
Q 52/63
Score 0
What are two sources of freshwater used by cities for drinking water?
30
wetlands and polar ice
aquifers and rivers
rivers and ocean water
glaciers and lakes
Q 53/63
Score 0
Which of these processes is responsible for increasing dissolved oxygen levels in the oceans?
30
respiration
topography
photosynthesis
harvesting kelp
Q 54/63
Score 0
Which of the following could not live on the ocean floor of the oceanic zone?
30
worms
fish
algae
bacteria
Q 55/63
Score 0
How do nutrients move in the ocean as a result of upwelling?
30
from the neritic zone to the intertidal zone
from deep, colder areas to warm, shallow areas
from warm, shallow areas to deep, colder areas
from the ocean floor into estuaries
Q 56/63
Score 0
What makes fertilizers a benefit to the farming industry?
30
they increase the nutrients in the soil
they decrease the chance of plants eaten by insects
they increase the growth of helpful bacteria
they decrease the chance of bacteria growing in the soil
Q 57/63
Score 0
Which of the pollutants below is an example of non-point source pollution?
30
chemical run-off from lawns
oil from a leaking a tank
dirty water from a leaking pipe
chemicals released from a paper mill
Q 58/63
Score 0
What is the difference between a point-source pollution and non-point source pollution?
30
point-source pollution comes from pipes; non-point source pollution comes from run-off
point-source pollution causes little damage to water; non-point source pollution causes great damage to water
point-source pollution refers to oil pollution; non-point pollution refers to chemical pollution
point-source pollution comes from one site; non-point source pollution comes from many sites
Q 59/63
Score 0
Upwelling is a process where winds blow surface water offshore, causing cold water from below the surface to rise upwards along with sediment. What is a possible consequence of upwelling?
30
it causes a uniformity of minerals in the ocean
it helps maintain the salinity of water
it decreases
it causes an increase in the growth of phytoplankton
Q 60/63
Score 0
A city in NC was supplied with drinking water from underground. It was observed that within 2 years of industrial development, the water became unfit for drinking. What could be a reason for this change?
30
the water had an increase oxygen
the water became soft
The level of nitrates increased
the turbidity of the water was low
Q 61/63
Score 0
A researcher collects water samples from three nearby lakes. He finds that the water sample from Lake 1 has a larger variety of invertebrates than Lake 2, while the water sample from Lake 3 has a few of one type of invertebrates. What can likely be concluded about the quality of water in the lakes?
30
water in lakes 2 & 3 has better quality than water in lake 1
water in lakes 1 &3 has better quality than water in lake 2
water in lake 2 has has better quality than water in lakes 1&3
Water in lake 1 has better quality than water in lakes 2 &3
Q 62/63
Score 0
In the USA, which is responsible for ensuring the safety of the country's drinking water?
30
National Oceanic & Atmospheric Administration (NOAA)
Center for Disease Control (CDC)
Food and Drug Administration (FDA)
Environmental Protection Agency (EPA)
Q 63/63
Score 0
Water that is safe to drink is called
30
estuary water
upwelling water
potable water
ocean water
63 questions
Q.Which of these contain most of Earth's water?
1
30 sec
Q.Where is most of the freshwater on Earth located?
2
30 sec
Q.A rock layer that collects and stores water is called?
3
30 sec
Q.An area of land that drains into a river or lake is called
4
30 sec
Q.Pamlico Sound is an estuary because it is
5
30 sec
Q.An ocean basin is
6
30 sec
Q.What is the source of most of the salt in the ocean
7
30 sec
Q.Which is NOT a threat to living ocean resources?
8
30 sec
Q.Which are the main producers in the ocean?
9
30 sec
Q.Producers in the upper part of the ocean get nutrients from
10
30 sec
Q.How are estuaries different from lakes or the ocean?
11
30 sec
Q.An example of non-point source of pollution
12
30 sec
Q.A clear example of point-source pollution is
13
30 sec
Q.What is a possible effect of high nutrient levels in water systems?
14
30 sec
Q.Which of the following occurs when algae decompose in the ocean?
15
30 sec
Q.For what types of water does the Clean Water Act set water quality standards?
16
30 sec
Q.Which of the following are indicators of a healthy water source?
17
30 sec
Q.What is pollution?
18
30 sec
Q.A body of water that has a high turbidity is
19
30 sec
Q.Which of the following water pH levels is best for marine organism?
20
30 sec
Q.Which best describes a bioindicator
21
30 sec
Q.How can the atmosphere be considered part of the hydrosphere?
22
30 sec
Q.Which best describes a non-point source of pollution?
23
30 sec
Q.Which statement BEST explains the reason some insects can walk across the surface of a lake?
24
30 sec
Q.Which interaction illustrates a terrestrial-aquatic food web relationship?
25
30 sec
Q.Water temperature and depth of water are factors that can determine the type of organisms that live in different areas of the ocean. Which other factor is most important?
26
30 sec
Q.What is one way scientists analyze the health of a river?
27
30 sec
Q.Which example best represents an interconnection between an aquatic food web and a terrestrial food web?
28
30 sec
Q.What is one way the government of the United States attempts to reduce pollution in the oceans
29
30 sec
Q.The population density of marine life is greater along the shorelines of the ocean of the ocean than farther out in the deep waters of the oceans. Which statement provides the best reason for this situation?
30
30 sec
Q.An algae bloom in a water system is most likely caused by
31
30 sec
Q.One dry summer, a large number of fish suddenly died in a shallow river. Which is the BEST explanation for this fish kill?
32
30 sec
Q.Which of these is most likely to have a harmful effect on water quality?
33
30 sec
Q.What are the most likely effects of ocean upwelling?
34
30 sec
Q.Wilson Creek, a National Wild and Scenic River, flows through the Wilson Creek Gorge before it joins the Johns River. Which term best describes Wilson Creek?
35
30 sec
Q.Which factors are most characteristic of a healthy body of water?
36
30 sec
Q.Which organism is most likely to be found in an estuary environment?
37
30 sec
Q.If a body of water has low levels of dissolved oxygen, what can MOST LIKELY be concluded?
38
30 sec
Q.Phosphates help detergents make clothes whiter and clean dishes better. Which is the best reason why phosphates have been removed from detergents?
39
30 sec
Q.Which of these is NOT a body of freshwater
40
30 sec
Q.About what percentage of Earth's surface is covered with water?
41
30 sec
Q.What is the relationship between water and temperature and dissolved oxygen?
42
30 sec
Q.Which is a biological indicator of water quality?
43
30 sec
Q.Which best describes the area that separates water flowing into a river?
44
30 sec
Q.What is the most immediate effect of high levels of nitrates and phosphates in a body of water?
45
30 sec
Q.What is an indicator that a lake is healthy?
46
30 sec
Q.Why are faster moving rivers more likely to contain higher concentrations of dissolved oxygen than slower moving rivers
47
30 sec
Q.Which best explains why most of Earth's freshwater is NOT used for drinking?
48
30 sec
Q.Which is the correct statement regarding estuaries?
49
30 sec
Q.Which form of water has the highest density?
50
30 sec
Q.Which best explains the importance of dissolved gases in the ocean?
51
30 sec
Q.What are two sources of freshwater used by cities for drinking water?
52
30 sec
Q.Which of these processes is responsible for increasing dissolved oxygen levels in the oceans?
53
30 sec
Q.Which of the following could not live on the ocean floor of the oceanic zone?
54
30 sec
Q.How do nutrients move in the ocean as a result of upwelling?
55
30 sec
Q.What makes fertilizers a benefit to the farming industry?
56
30 sec
Q.Which of the pollutants below is an example of non-point source pollution?
57
30 sec
Q.What is the difference between a point-source pollution and non-point source pollution?
58
30 sec
Q.Upwelling is a process where winds blow surface water offshore, causing cold water from below the surface to rise upwards along with sediment. What is a possible consequence of upwelling?
59
30 sec
Q.A city in NC was supplied with drinking water from underground. It was observed that within 2 years of industrial development, the water became unfit for drinking. What could be a reason for this change?
60
30 sec
Q.A researcher collects water samples from three nearby lakes. He finds that the water sample from Lake 1 has a larger variety of invertebrates than Lake 2, while the water sample from Lake 3 has a few of one type of invertebrates. What can likely be concluded about the quality of water in the lakes?
61
30 sec
Q.In the USA, which is responsible for ensuring the safety of the country's drinking water?