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8th Grade Quarter 1 Benchmark
What is the large area of land that drains all of its water to a river when the surface is saturated?
Which body of water does not directly contribute water vapor into the atmosphere
Which of the following is not a source of fresh water?
an ice cap
Groundwater supplies are stored in
lakes and rivers
What type of marine ecosystem can include rivers, marshes, and swamps?
The process of upwelling occurs as a result of
warm, less-dense water that floats to the surface
cool, dense surface water that sinks and pushes deep water up
surface waves that mix surface and deep water
sunlight that warms deep water that rises to the surface
What happens when there is an excess of nutrients in water?
plant growth is reduced
algae growth is reduced
Which of the following statements about water quality is true?
fast-flowing streams have low levels of dissolved oxygen
water with high turbidity lowers the temp of the water
cooler water contains more dissolved oxygen than warmer water
water with a pH level of 10 or greater is optimal for all aquatic life
Which of the following types of water would contain the highest level of dissolved oxygen?
slow-moving, calm water
water with a high amount of nitrates
Which of the following is an example of point source pollution?
stormwater runoff in a city
waste water released from sewage plant
air pollution released from industry
Why do plant plankton not grow in the deep ocean?
because sunlight does not reach the deep ocean
because too many animals eat it before it can grow
because there are not enough dissolved gases to support it
because there is too much competition for the nutrients in the deep ocean
Which provides the largest source of dissolved oxygen in the ocean?
Which best explains the importance of estuaries?
Estuaries are freshwater areas that support a large amount of living things.
Estuaries are areas where freshwater and salt water collide, resulting in a large amount of biodiversity.
Estuaries are tropical areas that support an abundance of life found usually in cold regions of the ocean.
Estuaries are nutrient-rich areas because they have large amounts of carbon dioxide seeping into the water from the ground below.
Why are large numbers of ocean animals found in areas where upwelling occurs?
Oxygen is increased by the movement of water.
Oxygen is decreased by the movement of water.
Nutrients are increased by the movement of water.
Nutrients are decreased by the movement of water.
Which water quality data most likely indicates eutrophication?
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
runoff from fertilizer
infiltration of groundwater
The following water quality conditions are observed in a lake ecosystem:
High nitrate concentration
pH of 10
low dissolved oxygen (DO) levels
temperature of 60° F
Which best describes this ecosystem?
The ecosystem is suffering from the effects of desalination.
The ecosystem is suffering from the effects of fertilization.
the ecosystem is suffering from effects of eutrophication.
The ecosystem is suffering from the effects of evaporation.
Which would most likely happen if too many nutrients entered in an estuary?
Nutrients would be used up by the fish and plants, keeping the estuary in balance.
Algal blooms would lower dissolved oxygen levels, causing fish to suffocate.
Algal blooms would decrease, leaving few food resources for fish.
Nutrients would sink to the bottom, increasing soil deposition.
Which would be the most likely cause of large numbers of fish dying in a stream?
a lack of oxygen
high levels of mercury
decreased carbon dioxide
low dissolved oxygen concentration
Which event will lead to the greatest reduction of dissolved oxygen in a lake?
decreased number of fish in the lake
increased nutrients and algal blooms
increased number of fish in the lake
decreased number of plants surrounding the lake
The term for pollution that can be traced to a specific location is
Which of the following is an example of a non-point source of pollution?
runoff from a farm field
a leaking septic tank
a pipe releasing chemicals
a cracked oil drum
Which law protects the drinking water of human population globally?
Clean Water Act
U.S. Marine Protection, Research, and Sanctuaries Act
Safe Drinking Water Act
Which is an incorrect order of the water cycle?
Evaporation, condensation, precipitation
Evaporation, precipitation, condensation
Precipitation, evaporation, condensation
Where is the majority of Earth’s freshwater located?
Which is true concerning the structure of the hydrosphere?
There is one ocean with one basin
There are many oceans with many basins
The ocean is connected to many lakes and waterways
The 6 oceans are separate bodies of water
Which will most likely happen if a higher percentage of water is located in the ground than in the oceans?
Water will become less polluted
Water will become more polluted
Water will take less time to complete the water cycle
Water will take more time to complete the water cycle
Use the diagram below to answer questions 28-29.
Which would least likely be a water cycle function of a watershed?
Collects rainfall water
Discharges water as runoff
Provides a habitat for many organisms
Which of the following best contributes to the flow of water in a watershed?
Which represents the distribution of water on earth?
97% freshwater, 3% salt water
3% freshwater, 97% salt water
71% freshwater, 29% salt water
29% freshwater, 71% salt water freshwater and salt water collide, resulting in a large amount of biodiversity.
Algal blooms would decrease, leaving few food re