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12 Questions

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Introduction to Marine Biology

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Questions and Answers

What is the main difference between Marine Biology and Oceanography?

Marine Biology measures salinity using a hydrometer, while Oceanography uses a different tool.

Marine Biology studies life in the ocean, while Oceanography studies the physical characteristics of the ocean. (correct)

Marine Biology studies freshwater ecosystems, while Oceanography studies saltwater ecosystems.

Marine Biology focuses on icebergs melting, while Oceanography focuses on salt runoff.

What does salinity measure in water?

The density of the water

The pressure of the water

The amount of salt dissolved in the water (correct)

The temperature of the water

How is salinity expressed?

As a percentage or parts per thousand (correct)

In grams per liter

As a ratio of water to salt

In milliliters per liter

What is the most common salt dissolved in ocean water?

Sodium chloride Signup and view all the answers

Which process decreases both salinity and density of water?

Runoff Signup and view all the answers

What tool is used to measure salinity by determining the density of water?

Hydrometer Signup and view all the answers

What is the classification for organisms that can swim against currents?

Nekton Signup and view all the answers

Which type of plankton performs photosynthesis?

Phytoplankton Signup and view all the answers

What percentage of Earth's oxygen is estimated to be produced by phytoplankton?

60-70% Signup and view all the answers

Which type of plankton is mainly composed of eggs and larvae of invertebrates?

Microplankton Signup and view all the answers

What do zooplankton primarily perform within the marine ecosystem?

Cellular Respiration Signup and view all the answers

What is the main reason phytoplankton must live in the photic zone?

To perform photosynthesis Signup and view all the answers