SWS Exam 2 2024/2025 Questions and Correct Answers
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Course
SWS
Institution
SWS
SWS Exam 2 2024/2025 Questions and
Correct Answers
Know the 3 basic types of Florida rivers. - CORRECT ANSWER-*Aalluvial river* = large
well defined watershed carries a high sediment load and has a large forested floodplain.
*Black water river* = has dark stained waters from decom...
SWS Exam 2 2024/2025 Questions and
Correct Answers
Know the 3 basic types of Florida rivers. - CORRECT ANSWER-*Aalluvial river* = large
well defined watershed carries a high sediment load and has a large forested floodplain.
*Black water river* = has dark stained waters from decomposing plant
*Spring fed river* = cool clear water issuing from springs
Know why river flow in Florida generally is very slow. - CORRECT ANSWER-River flow
is due to *gravity* so the steeper the gradient... faster flow, Florida is flat
Know what a river gradient is. - CORRECT ANSWER-Driving force for river flow
Equation: the difference in elevation between two points on a river divided by the
distance (Delta H/ Distance between)
Know the 3 basic features of Florida lakes. - CORRECT ANSWER-Small, shallow,
warm
Know the difference between euphotic and disphotic zones in lakes. - CORRECT
ANSWER-Euphotic= light sufficient for photosynthesis. Disphotic= light insufficient for
photosynthesis
Know the #1 source of lake formation in Florida. - CORRECT ANSWER-Sinkholes
Okeechobee is what type of lake? - CORRECT ANSWER-Ancient Depression
Know how groundwater use in Florida compares with groundwater use in the U.S. -
CORRECT ANSWER-63% FL, 21% USA groundwater
Know the two factors that lead to a doubling of FL population between 1950 and 1970. -
CORRECT ANSWER-Mosquito control, air conditioning
Know how much water is withdrawn daily in FL. - CORRECT ANSWER-7 billion gal/ day
Limestone is the common name for what compound? - CORRECT ANSWER-Calcium
carbonate
Understand basically how the oceans are made salty. - CORRECT ANSWER-as water
moves across the watershed it dissolves salts and minerals that naturally exist in the
environment
, Understand what is meant by "precipitation" and how it applies to limestone formation. -
CORRECT ANSWER-Precipitation= when two or more oppositely charged ions come
together to form a solid
Rainfall naturally acidic= In the ocean Calcium and dissolved CO3 comes together to
form calcium carbonate
Ca & CO3 are near saturation levels in the ocean, so when they come together they
form limestone
Know the dominant mechanism by which limestone formations are made. - CORRECT
ANSWER-Marine invertebrates to make their shells, which later turns into limestone.
Understand the fundamental evolution of the carbonate elements of the Florida
platform, including the time frames, the origin of the carbonates, general conditions
relative to sea levels, etc. - CORRECT ANSWER--rock torn from African continent from
the separation of pangea.
-from about 150 mya to 25mya there are carbonates dominately that come from shells
from marine vertebrates.
-sea levels relatively high: the organisms prefer this environment
1) The FL limestone Platform was dominated by marine carbonate deposition between
150 and 24 MYA.
2) The most recently deposited carbonates from the Oligocene and the Eocene
between 50 and 25 MYA
- comprise some of the most productive water bearing units of the Floridan aquifer.
3) Silicon-based (siliciclastic) Miocene epoch sediments from the continent, principally
the Appalachians, settled over the carbonates beginning about 25 MYA forming the
upper confining unit for much of the aquifer
Know the time period during which the water-bearing elements of the Floridan aquifer
developed. - CORRECT ANSWER-Eocene 50-25 mya
Water-bearing elements are closer to the surface, porous and highly charged. From
about 50mya- about 25mya generally speaking.
Understand why continental silicon-based materials did not intrude substantially on the
platform for approximately 125 mil. years and the changes that occurred that allowed
them to influence the FL platform subsequently. - CORRECT ANSWER-Because the
Suwanee Current through the Georgia Channel isolated the platform. Then 25 mya, sea
levels lowered & the Suwanee Current disappeared, & Florida was no longer isolated
suspended silicon based sediments in oceans and carried over rivers.
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