Ocean
Quiz by Iteoluwakishi Babalola
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36 questions
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- Q1What is the biological process through which organisms extract minerals from water?Sulfate bindingIron filtrationZinc absorptionCalcium extraction30s
- Q2Where does the salt in ocean water mainly come from?Evaporation of the waterPollution from shipsUnderwater volcanoesRun off from the land and openings in the sea floor30s
- Q3Which factor contributes to the ocean water becoming saltier due to chemical reactions?Freshwater influxHydrothermal fluids from the sea floorOcean currentsAtmospheric pressure30s
- Q4Why aren't lakes and rivers as salty as oceans?Higher precipitation levelsContinuous flowing of water prevents salt accumulationGeographical locationLack of minerals in the water30s
- Q5Which two minerals make up around 85% of all dissolved minerals in the ocean?Calcium and magnesiumSulfate and copperChloride and sodiumIron and zinc30s
- Q6Where does most of the salt in the ocean come from?Volcanic eruptionsEvaporation of seawaterMeteor showersRun off from the land and openings in the sea floor30s
- Q7What are the two main sources of salt in the ocean?Run off from the land and openings in the sea floorIndustrial waste dumpingAlien invasionFish excretion30s
- Q8What happens to rainwater when it meets the land surface?It becomes sweet like honeyIt turns into snowIt erodes the rocks and picks up small amounts of salt and other dissolved minerals.It evaporates instantly30s
- Q9Why 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 bacteriaThey have special salt filtersThey are filled with freshwater from glaciers30s
- Q10Which two minerals make up around 85% of all dissolved minerals in the ocean?Iron and copperDiamond and rubyGold and silverChloride and sodium30s
- Q11Why aren't lakes and rivers as salty as the ocean?Lakes and rivers have less rainfallContinuous flow prevents salt accumulation and carries away salt into the ocean.Lakes and rivers are closer to the sea floorLakes and rivers have fewer minerals30s
- Q12What percentage of the Earth's surface is covered by oceans?50%80%90%70%.30s
- Q13From where do oceans get around 97% of their water?Underground reservoirsVolcanic eruptionsRun off from the land and precipitation.Icebergs melting30s
- Q14What makes ocean water undrinkable?Presence of mineralsHigh salt content.Cold temperatureHigh oxygen content30s
- Q15What process causes the ocean water to lose oxygen, magnesium, and sulfates?DecompositionEvaporationFreezingHeating by magma from the earth's core.30s