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8.E.1. Hydrosphere Unit Test

Quiz by Deborah Roll

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25 questions
Show answers
  • Q1
    1. Which would most likely result from a DECREASE in the water supply to a watershed?
    Increase in ocean water levels
    Decrease in lake water levels
    Decrease in river basin levels
    30s
  • Q2
    2. The drain in a sink would represent which part of a river basin?
    a mountain stream
    Water flowing into the ocean.
    a meander
    River rapids
    30s
  • Q3
    3. Which best describes the importance of an aquifer?
    It holds uncontaminated ground water for human use.
    It provides water for oceans.
    It supplies all the water for lakes and rivers
    30s
  • Q4
    4. Which represents the distribution of water on Earth?
    71% fresh water, 29% salt water
    97% fresh water, 3% saltwater
    3% freshwater, 97% salt water
    29% fresh water, 71% salt water
    30s
  • Q5
    5. What BEST describes the amount of frozen water on Earth?
    About 2% of the Earth's water is frozen.
    Exactly 0.9% of the Earth's water is frozen.
    About 35% of Earth's water is frozen.
    30s
  • Q6
    6. Which type of water reservoir contains the largest volume of freshwater?
    Rivers
    Lakes
    Ice sheets
    Aquifers
    30s
  • Q7
    7. Where is the majority of Earth's freshwater located at? (Look at #6!)
    lakes
    Ice
    groundwater
    oceans
    30s
  • Q8
    8. Which statement about ocean currents is the most accurate?
    Ocean currents influence life at the shore.
    Ocean currents keep the ocean temperature unstable.
    Ocean currents are a major cause of glacier formation.
    Ocean currents stir nutrients and bring them to the surface to help in the production of algae.
    30s
  • Q9
    9. Which technology has allowed scientists to accurately map the ocean floor?
    Satellites
    Sonar
    submersibles
    Scuba gear
    30s
  • Q10
    10. How do oceanic upwellings help microscopic plankton to grow?
    They bring warmer water to the surface of the ocean.
    They bring dissolved nutrients to the surface of the ocean.
    They decrease the levels of oxygen at the surface of the ocean.
    They decrease the amount of nutrients at the surface of the ocean.
    30s
  • Q11
    11. Which best explains why there is a greater concentration of oxygen located near the ocean's surface?
    Sunlight warms the ocean's temperature and stimulates oxygen production near the surface.
    Algae or phytoplankton, release oxygen and live near the surface of the ocean where they receive large amounts of sunlight.
    Plankton produces excess amounts of nutrients that remove oxygen levels from the atmosphere.
    Marine life (fish and ocean animals) give off oxygen instead of carbon dioxide, which makes the ocean water rich in oxygen.
    30s
  • Q12
    12. Which is the most likely result of an INCREASE in the level of nitrates in a body of water?
    Nitrates would cause an increase in turbidity
    Nitrates would cause an increase in the fish population.
    Nitrates would cause an increase in water temperature.
    Nitrates would cause an increase in plant growth.
    30s
  • Q13
    13. How do algae blooms affect the health of a water system?
    Algae does photosynthesis and DECREASES the amount of dissolved oxygen which INCREASES the water quality.
    Algae does photosynthesis and INCREASES the amounts of dissolved oxygen which DECREASES the water quality.
    Algae can block sunlight and their decomposition decreases dissolved oxygen in the water, making the water quality unhealthy.
    30s
  • Q14
    14. Students monitored the turbidity in a local river for a week and recorded the data. Based on what you know about turbidity and dissolved oxygen, what day would the dissolved oxygen most likely be the lowest?
    Day 5- turbidity is 7.9 NTU
    Day 6- turbidity is 2.5 NTU
    Day 2- turbidity is 1.8 NTU
    Day 4- turbidity is 8.3 NTU
    30s
  • Q15
    15. What may cause scientists to be concerned about the quality of lake water? ( What would cause it to be unhealthy?)
    high levels of oxygen
    high levels of nitrates
    low levels of arsenic
    low levels of salt
    30s

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