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Ocean

Quiz by Iteoluwakishi Babalola

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36 questions
Show answers
  • Q1
    What is the biological process through which organisms extract minerals from water?
    Sulfate binding
    Iron filtration
    Zinc absorption
    Calcium extraction
    30s
  • Q2
    Where does the salt in ocean water mainly come from?
    Evaporation of the water
    Pollution from ships
    Underwater volcanoes
    Run off from the land and openings in the sea floor
    30s
  • Q3
    Which factor contributes to the ocean water becoming saltier due to chemical reactions?
    Freshwater influx
    Hydrothermal fluids from the sea floor
    Ocean currents
    Atmospheric pressure
    30s
  • Q4
    Why aren't lakes and rivers as salty as oceans?
    Higher precipitation levels
    Continuous flowing of water prevents salt accumulation
    Geographical location
    Lack of minerals in the water
    30s
  • Q5
    Which two minerals make up around 85% of all dissolved minerals in the ocean?
    Calcium and magnesium
    Sulfate and copper
    Chloride and sodium
    Iron and zinc
    30s
  • Q6
    Where does most of the salt in the ocean come from?
    Volcanic eruptions
    Evaporation of seawater
    Meteor showers
    Run off from the land and openings in the sea floor
    30s
  • Q7
    What are the two main sources of salt in the ocean?
    Run off from the land and openings in the sea floor
    Industrial waste dumping
    Alien invasion
    Fish excretion
    30s
  • Q8
    What happens to rainwater when it meets the land surface?
    It becomes sweet like honey
    It turns into snow
    It erodes the rocks and picks up small amounts of salt and other dissolved minerals.
    It evaporates instantly
    30s
  • Q9
    Why are lakes and rivers not as salty as oceans?
    The flowing nature of lakes and rivers prevents salt accumulation and carries it away.
    They have salt-eating bacteria
    They have special salt filters
    They are filled with freshwater from glaciers
    30s
  • Q10
    Which two minerals make up around 85% of all dissolved minerals in the ocean?
    Iron and copper
    Diamond and ruby
    Gold and silver
    Chloride and sodium
    30s
  • Q11
    Why aren't lakes and rivers as salty as the ocean?
    Lakes and rivers have less rainfall
    Continuous flow prevents salt accumulation and carries away salt into the ocean.
    Lakes and rivers are closer to the sea floor
    Lakes and rivers have fewer minerals
    30s
  • Q12
    What percentage of the Earth's surface is covered by oceans?
    50%
    80%
    90%
    70%.
    30s
  • Q13
    From where do oceans get around 97% of their water?
    Underground reservoirs
    Volcanic eruptions
    Run off from the land and precipitation.
    Icebergs melting
    30s
  • Q14
    What makes ocean water undrinkable?
    Presence of minerals
    High salt content.
    Cold temperature
    High oxygen content
    30s
  • Q15
    What process causes the ocean water to lose oxygen, magnesium, and sulfates?
    Decomposition
    Evaporation
    Freezing
    Heating by magma from the earth's core.
    30s

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