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Marine Science Exam 1 Study Guide Questions with Verified Answers
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  • Marine Science

The ocean covers about 70% of Earth - Answer-true Current trends regarding the ocean include: fish populations and fishing industries are thriving; a high percentage of coral reefs are at high risk of coral bleaching; and the acidity level of the oceans is currently increasing making it harder f...

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  • September 22, 2024
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  • 2024/2025
  • Exam (elaborations)
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  • marine science exam 1 study guide questions with v
  • the ocean covers about 70 of earth answer true

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Marine Science Exam 1 Study Guide
Questions with Verified Answers
The ocean covers about 70% of Earth - Answer-true

Current trends regarding the ocean include: fish populations and fishing industries are
thriving; a high percentage of coral reefs are at high risk of coral bleaching; and the
acidity level of the oceans is currently increasing making it harder for shell-making
organisms to make their shell. - Answer-false; 70% of fisheries are in trouble because
the fish are not reproducing as fast as the fisheries are fishing

The impact of the ocean on the Earth's climate is that without it, Earth would be
uninhabitable by humans due to a more extreme climate. - Answer-true

Phytoplankton is important because it provides at least 25% of our oxygen - Answer-
false; phytoplankton provide at least 50% of the worlds oxygen

Animals such as squid, sea slugs, and sea stars have simpler biology than humans, the
potential to give us solutions for human disease, and the ability to tell us our own
biology. - Answer-true

Sea sponges have anti-tumor and anti-cancer properties - Answer-true

The discovery of the characteristics of shark skin is so valuable because its physical
makeup of tiny tooth-like scales can be replicated in microscopic version to speed up
bacteria growth on surfaces - Answer-false; it reduces the spreading of bacteria

The discovery of the horseshoe crab is so valuable because its blue blood can be used
to detect bacterial contamination on medical equipment such as IV's and injectable
drugs. - Answer-true

be able to identify the following on a map: Indian Ocean, Gulf of Mexico, Arctic Ocean,
Pacific Ocean, Mariana Trench, and Great Barrier Reef - Answer--

Water does not dissolve other substances easily - Answer-false; it can dissolve things
easily

The fact that water is more viscous than air allows drifting organisms to suspend
themselves easily, causes swimming organisms to expend more energy to move, and
results from water's oxygen bonds that hold water molecules together. - Answer-false;
hydrogen bonds

Water's ability to absorb a lot of heat before increasing in temperature allows marine
organisms to gradually adjust to changing temperatures. - Answer-true

, The following happens when water freezes: molecules take up more space; water
beneath it is colder making the water uninhabitable, and it floats. - Answer-false; the ice
insulates the water

The characteristics of estuaries are places where lakes and rivers connect; changing
water levels because of daily tides; and high biodiversity. - Answer-False; where
freshwater from stream and rivers mix with saltwater from the ocean

Estuaries do the following: hold the sediment in place with plant roots; provide
protection for many organisms; and increase erosion. - Answer-False; decrease erosion

The impact of estuaries on fish populations is they protect a large portion of commercial
fish species during their juvenile stage. - Answer-True

Estuary environments affect water quality by cleaning the water from land as it moves
through by trapping pollutants and sediments in the algae and fish beds - Answer-f;
plant roots

If an estuary were removed for development, flooding would cease to be a problem -
Answer-f; reach a much higher amount than before

Sediments from the bottom bring saltwater into the estuary - Answer-f; tides

Mangroves are trees that can survive on the edges of the coast in warm saltwater. -
Answer-true

Salt marshes produce five times the plant material compared to an agricultural area the
same size - Answer-f; twice

Mangrove roots trap sediments and salt that can be polluted which damages reefs and
seagrass beds. - Answer-f; protects

Adaptations that allow Mangroves to survive in their environment are glands in their
leaves that release salt, waxy substances on the roots that keep saltout, and they send
saltto old leaves that fall off. - Answer-t

The ocean is salty because the sodium and chloride react in the water and form salt -
Answer-f; rocks from land and sea

Lower precipitation rates than evaporation results in a lower salinity level. - Answer-f;
higher

Dissolved salts make up 35%of seawater - Answer-f; 3.5%

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