Freshwater is less dense than saltwater. (True or false?)

Freshwater is less dense than saltwater.
 
  Indicate whether this statement is true or false.

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Q. 2 - A geyser is a type of artesian well.
 
  Indicate whether this statement is true or false.

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Q. 3 - Which of the following is an example of a speleothem?
 
  A) Stalagmite
  B) Sinkhole
  C) Spring
  D) Hot spring

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Q. 4 - The majority of groundwater occurs as underground rivers.
 
  Indicate whether this statement is true or false.

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Q. 5 - The general term used to describe cave deposits is ________.
 
  A) cave pearls
  B) dripstone
  C) bicarbonate
  D) dissolution features

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Q. 6 - Which acid, found in most groundwater, is responsible for most karst topography worldwide?
 
  A) Hydrochloric
  B) Nitric
  C) Sulfuric
  D) Carbonic