Goal 3 Water Review
8th grade science EOG water review.
Questions and Answers
- 1.
Water that is stored in the spaces between rocks and dirt is called ________.
- A.
Rain water
- B.
Precipitation
- C.
Spring
- D.
Groundwater
Correct Answer
D. GroundwaterExplanation
Groundwater refers to water that is stored underground in the spaces between rocks and dirt. It is an important source of water for many wells and springs, and it plays a crucial role in maintaining the water cycle. Groundwater can be accessed through wells and can also flow to the surface through springs. It is distinct from rainwater and precipitation, which refer to water that falls directly from the atmosphere in the form of rain, snow, sleet, or hail.Rate this question:
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- 2.
This water strider is able to walk on water because of what property of water? This property is also why doing this hurts!
- A.
Buoyancy
- B.
Adhesion
- C.
Cohesion
- D.
Surface tension
Correct Answer
D. Surface tensionExplanation
The water strider is able to walk on water because of the property of surface tension. Surface tension is the cohesive force between water molecules at the surface, creating a "skin" that allows the water strider to float and move across the water's surface. However, doing this hurts because surface tension is also responsible for the resistance experienced by the water strider when it tries to penetrate the water's surface. This resistance can cause discomfort or pain for the water strider.Rate this question:
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- 3.
Water sticking to water is called ________.
- A.
Cohesion
- B.
Adhesion
- C.
Specific heat
- D.
Density
Correct Answer
A. CohesionExplanation
Cohesion refers to the property of water molecules being attracted to each other. This attraction is due to the hydrogen bonding between the water molecules. As a result, water molecules tend to stick together, forming droplets or creating surface tension. This property is essential for various biological processes, such as the transportation of water in plants and the ability of insects to walk on water.Rate this question:
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- 4.
Water percentage of water on Earth is saltwater?
- A.
3
- B.
97
- C.
25
- D.
50
Correct Answer
B. 97Explanation
97% of Earth's waters is saltwater, and 3% is freshwater. Most freshwater on Earth is located in the polar ice caps.Rate this question:
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- 5.
Water forms droplets. What property of water does this demonstrate?
- A.
Cohesion
- B.
Precipitation
- C.
Adhesion
- D.
Surface tension
Correct Answer
A. CohesionExplanation
Water sticking to water is known as cohesion. Cohesion is the reason water forms droplets.Rate this question:
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- 6.
Water in the form of gas is called?
- A.
Condensation
- B.
Evaporation
- C.
Water vapor
- D.
Ice
Correct Answer
C. Water vaporExplanation
Water in the form of gas is called water vapor. When water molecules gain enough energy, they break free from the liquid phase and become a gas. This process is known as evaporation. The gaseous water molecules are then referred to as water vapor. Water vapor is invisible to the naked eye and is present in the atmosphere. It can condense back into liquid water through a process called condensation, or freeze into ice if the temperature is low enough.Rate this question:
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- 7.
Which ocean zone is always covered by water, is shallow enough for photosynthesis to take place, and can contain kelp forests?
- A.
Open ocean
- B.
Intertidal zone
- C.
Nertic zone
- D.
Coast
Correct Answer
C. Nertic zoneExplanation
The nertic zone is the correct answer because it is the ocean zone that is always covered by water and is shallow enough for photosynthesis to occur. This zone is also known for containing kelp forests, which further supports the correctness of the answer.Rate this question:
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- 8.
This is a starfish trapped on the beach unable to survive. Which ocean zone is this organisms habitat?
- A.
Nertic zone
- B.
Open ocean
- C.
Intertidal zone
- D.
Sea-floor
Correct Answer
C. Intertidal zoneExplanation
The intertidal zone is the area where the ocean meets the land, and it is characterized by being periodically exposed to air and water due to the tides. This habitat is suitable for organisms like starfish that can tolerate both underwater and dry conditions. In this scenario, the starfish is trapped on the beach, indicating that it is in the intertidal zone where it is unable to survive without being submerged in water.Rate this question:
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- 9.
Where is most of Earth's freshwater located?
- A.
In polar ice caps
- B.
In lakes and rivers
- C.
As groundwater
- D.
In the oceans
Correct Answer
A. In polar ice capsExplanation
Most of Earth's freshwater is frozen in glaciers and icebergs.Rate this question:
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- 10.
Which of the following is an example of a benthos.
- A.
A shark
- B.
Algae
- C.
A crab
- D.
A clownfish
Correct Answer
C. A crabExplanation
A benthos refers to organisms that live on or near the bottom of a body of water. Among the given options, a crab is the only one that fits this description. Sharks are typically pelagic, meaning they inhabit the open ocean. Algae are usually found floating or suspended in the water column. Clownfish are typically associated with coral reefs and live in close proximity to the reef structure rather than the bottom. Therefore, a crab is the most suitable example of a benthos among the given options.Rate this question:
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- 11.
Algae is an example of an _______.
- A.
Benthos
- B.
Free swimmer
- C.
Bottom dweller
- D.
Plankton
Correct Answer
D. PlanktonExplanation
Algae is an example of plankton because it is a microscopic organism that drifts or floats in water. Plankton includes both plants (phytoplankton) and animals (zooplankton) that are unable to swim against the current and rely on water currents to move. Algae, being a type of photosynthetic plant-like organism, is considered phytoplankton. It is important to note that plankton can be found throughout the water column, including the surface, middle, and bottom layers of the ocean.Rate this question:
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- 12.
Which type of irrigation pours water through canals and waterways?
- A.
Flood irrigation
- B.
Spray irrigation
- C.
Drip irrigation
- D.
Reservoir irrigation
Correct Answer
A. Flood irrigationExplanation
Flood irrigation is the type of irrigation that pours water through canals and waterways. In this method, water is allowed to flow over the fields, similar to a flood, and is distributed to the crops. It is a traditional method of irrigation and is commonly used in areas with abundant water supply. Flood irrigation is suitable for crops that can withstand being submerged in water for short periods of time. This method helps to ensure that the fields are evenly watered and can be an efficient way of irrigating large areas of land.Rate this question:
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- 13.
A channel dug to allow boats to travel from one river to another is an example of a
- A.
Canal
- B.
Lake
- C.
Reservoir
- D.
Sewage system
Correct Answer
A. CanalExplanation
A channel dug to allow boats to travel from one river to another is an example of a canal. Canals are man-made waterways constructed for navigation, irrigation, or water supply purposes. They are typically long and narrow, with artificial banks and sometimes locks to control water levels. In this case, the channel serves as a passage for boats to move between two rivers, facilitating transportation and trade. Canals have been historically important for connecting water bodies and enabling efficient transportation of goods and people.Rate this question:
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- 14.
In a sewage system, what is added to kill harmful bacteria?
- A.
Chlorine
- B.
Sand
- C.
Bacteria
- D.
Soap
Correct Answer
A. ChlorineExplanation
Chlorine is added to a sewage system to kill harmful bacteria. Chlorine is a strong disinfectant and has the ability to kill a wide range of microorganisms, including bacteria. It is commonly used in sewage treatment plants to ensure that the water being discharged is free from harmful pathogens.Rate this question:
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- 15.
The term for pollution that can be traced to a specific location is
- A.
Water pollution
- B.
Point-source pollution
- C.
Nonpoint-source pollution
- D.
Runoff polluition
Correct Answer
B. Point-source pollutionExplanation
Point-source pollution refers to pollution that can be traced back to a specific location or source. This means that the pollution originates from a single identifiable point such as a factory, sewage treatment plant, or oil spill. The contaminants are released directly into a water body or the environment, making it easier to identify and address the source of pollution. Nonpoint-source pollution, on the other hand, is pollution that comes from diffuse sources, such as agricultural runoff or urban stormwater, making it more challenging to pinpoint the exact origin.Rate this question:
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- 16.
A section of a waterway in which ships are raised or lowered is called a
- A.
Turbine
- B.
Fish ladder
- C.
Dam
- D.
Lock
Correct Answer
D. LockExplanation
A lock is a section of a waterway in which ships are raised or lowered. It is a device used for controlling water levels and allowing boats and ships to navigate through different elevations in a canal or river. The lock system consists of two gates that can be opened or closed to either raise or lower the water level, allowing vessels to pass through. This helps to overcome changes in water levels and ensures a smooth and safe passage for ships. A turbine, fish ladder, and dam are not specifically related to the process of raising or lowering ships in a waterway.Rate this question:
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- 17.
In a sewage plant, sludge and oil are consumed by
- A.
Chlorine
- B.
Sand
- C.
Bacteria
- D.
Soap
Correct Answer
C. BacteriaExplanation
Bacteria play a crucial role in the decomposition of sludge and oil in a sewage plant. They are capable of breaking down organic matter into simpler compounds through the process of biodegradation. This process helps to reduce the volume of sludge and oil, making it easier to treat and dispose of. Chlorine is typically used in sewage treatment for disinfection purposes, while sand is used for filtration. Soap, on the other hand, is not involved in the consumption or breakdown of sludge and oil.Rate this question:
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- 18.
What are the three forms of water on Earth?
- A.
Groundwater, lakes, and clouds
- B.
Liquid water, frozen water, and water vapor
- C.
Gas, steam, and vapor
- D.
Groundwater, oceans, and ice
Correct Answer
B. Liquid water, frozen water, and water vaporExplanation
The three forms of water on Earth are liquid water, frozen water, and water vapor. Liquid water is the most common form of water found on Earth's surface, such as in rivers, lakes, and oceans. Frozen water refers to ice, which can be found in glaciers, icebergs, and snow. Water vapor is the gaseous form of water that is present in the atmosphere. These three forms of water are constantly interchanging through processes like evaporation, condensation, and precipitation, contributing to the water cycle on Earth.Rate this question:
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- 19.
How is water stored in an aquifer?
- A.
In an open underground lake
- B.
In cracks and spaces in rocks
- C.
In impermeable rock
- D.
In wells and springs
Correct Answer
B. In cracks and spaces in rocksExplanation
Water is stored in an aquifer in cracks and spaces in rocks. Aquifers are underground layers of permeable rock or sediment that hold and transmit water. Water seeps into these cracks and spaces, filling them up and creating a storage reservoir. The rocks act as a natural storage system, allowing water to be stored underground until it is needed. This stored water can be accessed through wells and springs when necessary.Rate this question:
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- 20.
Warm water stays at the oceans surface because
- A.
It is less dense than cold water
- B.
It is more dense than cold water
- C.
Is saltier that cold water
- D.
It has more carbon dioxide than cold watert
Correct Answer
A. It is less dense than cold waterExplanation
Warm water stays at the ocean's surface because it is less dense than cold water. When water is heated, the molecules move faster and spread out, causing the water to expand and become less dense. As a result, warm water rises to the surface while colder, denser water sinks to the bottom. This process, known as convection, plays a crucial role in ocean currents and the distribution of heat around the world.Rate this question:
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- 21.
Sonar measures ocean depth by means of
- A.
Sound waves
- B.
Weighted lines
- C.
Magnets
- D.
Light waves
Correct Answer
A. Sound wavesExplanation
Sonar measures ocean depth by means of sound waves. Sound waves are emitted from a sonar device and travel through the water. These waves bounce off the ocean floor and return to the device, allowing it to calculate the depth based on the time it takes for the waves to travel back. This method is effective because sound waves can travel long distances in water and can easily penetrate through the ocean. Weighted lines, magnets, and light waves are not used in sonar technology for measuring ocean depth.Rate this question:
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- 22.
Surface currents are caused by
- A.
Waves
- B.
Winds
- C.
Density
- D.
Heat
Correct Answer
B. WindsExplanation
Surface currents are caused by winds. Winds blowing across the surface of the ocean transfer their energy to the water, creating friction and causing the water to move in the same direction as the wind. This movement of water forms surface currents. The strength and direction of the winds determine the speed and direction of the surface currents.Rate this question:
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- 23.
Deep currents are caused by differences in
- A.
Location
- B.
Wind speed
- C.
Depth
- D.
Density
Correct Answer
D. DensityExplanation
Deep currents are caused by differences in density. Density refers to the mass of a substance per unit volume. In the case of deep currents, differences in density occur due to variations in temperature and salinity. Cold and salty water is denser than warm and less salty water, causing it to sink and flow along the ocean floor. This movement of dense water creates deep currents. Location, wind speed, and depth do not directly cause deep currents, making density the correct answer.Rate this question:
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- 24.
Tides are caused by the gravitational pull of
- A.
Earth and the Sun
- B.
The Sun and the Moon
- C.
Earth alone
- D.
Earth and the Moon
Correct Answer
D. Earth and the MoonExplanation
Tides are caused by the gravitational pull of the Earth and the Moon. The Moon's gravitational force attracts the water on Earth's surface, causing a bulge that creates a high tide. As the Earth rotates, different parts of the planet experience these high tides. The gravitational pull of the Moon also causes a second bulge on the opposite side of the Earth, creating a second high tide. This is why we experience two high tides and two low tides each day. The Sun also has a gravitational pull on the Earth, but it is weaker than the Moon's, so it contributes to a lesser extent to the formation of tides.Rate this question:
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- 25.
An environment that contains all the necessary requirements for an organism to live is called
- A.
The surface zone
- B.
A nodule
- C.
A habitat
- D.
An estuary
Correct Answer
C. A habitatExplanation
A habitat refers to an environment that provides all the essential conditions and resources for an organism to survive and thrive. It includes factors such as food, water, shelter, and suitable climate. Organisms depend on their habitats for their basic needs and to carry out their life processes. Therefore, a habitat is the correct answer as it encompasses the concept of an environment that contains all the necessary requirements for an organism to live.Rate this question:
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- 26.
Two kinds of wetlands that border estuaries are
- A.
Coral reefs and mangrove forests
- B.
Salt marshes and mangrove forests
- C.
Tidal pools and salt marshes
- D.
Mangrove forests and tidal pools
Correct Answer
B. Salt marshes and mangrove forestsExplanation
Salt marshes and mangrove forests are two types of wetlands that commonly border estuaries. Salt marshes are coastal wetlands that are regularly flooded by the tides. They are characterized by salt-tolerant grasses and other vegetation. Mangrove forests, on the other hand, are found in tropical and subtropical coastal areas and are dominated by mangrove trees. These wetlands provide important habitats for a wide range of species, including birds, fish, and other marine organisms. They also play a crucial role in protecting coastlines from erosion and filtering pollutants from the water.Rate this question:
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- 27.
Where would you expect to find ocean organisms that are able to survive out of water and withstand drastic changes in salinity?
- A.
An intertidal zone
- B.
A coral reef
- C.
The open ocean
- D.
A hydrothermal vent
Correct Answer
A. An intertidal zoneExplanation
Intertidal zones are areas along the coastline that are alternately submerged and exposed to air as the tide rises and falls. Organisms in these zones have adapted to survive in both aquatic and terrestrial environments, making them capable of withstanding drastic changes in salinity and being out of water for extended periods. This is why an intertidal zone is the most likely place to find ocean organisms that can survive out of water and endure fluctuations in salinity. Coral reefs, the open ocean, and hydrothermal vents do not experience the same frequent changes in water level and salinity as intertidal zones.Rate this question:
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- 28.
Where are hydrothermal vents located?
- A.
In the intertidal zone
- B.
On the deep-ocean floor
- C.
On coral reefs
- D.
In kelp forest
Correct Answer
B. On the deep-ocean floorExplanation
Hydrothermal vents are located on the deep-ocean floor. These vents are formed by cracks in the Earth's crust, allowing hot water to escape from beneath the surface. The water is heated by magma and contains various minerals and chemicals. These vents are known for their unique ecosystems and are home to diverse organisms that thrive in extreme conditions, such as high temperatures and high pressure. The deep-ocean floor provides the ideal environment for the formation of hydrothermal vents due to the geological processes occurring in this area.Rate this question:
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- 29.
The bacteria that form the base of the food chain at hydrothermal vents convert
- A.
Dim sunlight that filters down into the food
- B.
Heat from the vents into food
- C.
Phytoplankton that drift down into food
- D.
Chemicals released by the vents into food
Correct Answer
D. Chemicals released by the vents into foodExplanation
The bacteria at hydrothermal vents convert chemicals released by the vents into food. This is because hydrothermal vents release various chemicals such as hydrogen sulfide, methane, and iron, which serve as energy sources for the bacteria. These bacteria use a process called chemosynthesis to convert these chemicals into organic compounds, which then serve as food for other organisms in the food chain. This conversion of chemicals into food is essential for sustaining life in the extreme and dark conditions of hydrothermal vents.Rate this question:
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- 30.
Overfishing is best described as catching
- A.
More fish than people can eat
- B.
Fish at a faster rate than they can reproduce
- C.
Other kinds of fish than the ones intended
- D.
Fish with huge nets and long lines of hooks
Correct Answer
B. Fish at a faster rate than they can reproduceExplanation
Overfishing is best described as catching fish at a faster rate than they can reproduce. This means that the fishing activity is depleting the fish population faster than it can replenish itself through natural reproduction. This leads to a decline in fish stocks and can ultimately result in the collapse of fish populations and ecosystems. Overfishing is a major concern as it disrupts the balance of marine ecosystems and threatens the sustainability of fisheries and the livelihoods of those who depend on them.Rate this question:
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- 31.
Why are 30 percent of the fish that are caught by commercial fishing boats thrown away?
- A.
Fishing nets catch everything in their path
- B.
Smaller fish are thrown back into the ocean
- C.
Oil pollution has damaged many of the fish
- D.
Large phytoplankton interfere with nets and lines
Correct Answer
A. Fishing nets catch everything in their pathExplanation
Fishing nets are designed to catch a large quantity of fish at once, but they also catch everything else in their path, including unwanted or non-targeted species. This can result in the unintentional capture of smaller fish that are not suitable for commercial sale or consumption. These smaller fish are often thrown back into the ocean, leading to the wastage of approximately 30 percent of the total catch.Rate this question:
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Mar 20, 2023Quiz Edited by
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