Hydrosphere: Question Preview (ID: 25497)


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Approximately what percentage of Earth's surface is covered by water?
a) 10% b) 40% c) 70% d) 90%
Which water reservoir contains the most water?
a) groundwater b) lakes c) oceans d) streams
Water often is described as the universal solvent. What does that mean?
a) most common substances dissolve in water b) most substances do not dissolve in water c) water always dissolves other liquids easily d) water does not dissolve in other liquids easily
How will a layer of cold water and a layer of warm water settle in a container?
a) cold will be on top because it is more polar than warm b) warm will be on top because it is more polar than cold c) cold will be on top because it is less dense than warm d) warm will be on top because it is less dense than cold
Which describes water molecules being attracted to other polar molecules?
a) adhesion b) cohesion c) evaporation d) ionization
What agency is responsible for enforcing water pollution laws in the US?
a) DOE b) EPA c) NASA d) USGS
Which term means looking after a body of water and helping to keep it clean?
a) eutrophication b) stewardship c) maintaining quality standards d) monitoring the hydrosphere
What would happen to consumers if all producers perished?
a) Consumers would die b) consumers would move c) consumers would decompose organic matter d) consumers would make their own food
Which are organisms that break down tissue and release nutrients and carbon dioxide back into the ecosystems?
a) consumers b) decomposers c) producers d) scavengers
Which is a producer?
a) sea star b) sea urchin c) kelp d) Sun
Why are estuaries an important habitat for many marine organisms?
a) there are more predators in estuaries as compared to the open ocean b) there are fewer nutrients in estuaries as compared to the open ocean c) there is more food available in estuaries as compared to the open ocean d) there is more salt available in estuaries as compared to the open ocean
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