Marine Science and Oceanography Vocabulary

Vocabulary flashcards covering history, equipment, navigation, and methodology in marine science and oceanography.

Oceanography

The branch of Earth science that studies the physical aspects of the ocean.

Marine Biology

The scientific study of organisms and life in the ocean.

Aristotle

Greek philosopher (384–322 BC) who had a special interest in the living world, though he was not a scientist in the modern sense.

Hokule’a

A replica Polynesian double-hulled canoe that successfully sailed 40,000 miles around the world from 2014 to 2017 using stars, waves, and birds to navigate.

James Cook

English navigator who led 3 voyages starting in 1768; the first European to visit many Pacific locations and the first to use a chronometer for navigation.

Chronometer

An accurate sea clock used on ships to calculate longitude.

Prime Meridian

The line of reference located at $0^\top$ longitude that passes through Greenwich, England.

Sextant

An instrument used in navigation to measure the angle of the Sun or stars above the horizon to determine latitude.

Polaris (North Star)

A star located almost directly above the North Pole whose altitude above the horizon approximately equals the observer's latitude in the Northern Hemisphere.

Charles Darwin

English naturalist who traveled on the HMS Beagle (1831–1836), published Origin of Species in 1859, and studied barnacles and coral reef/island formation.

Coral Atoll

A ring-shaped coral reef, lagoon, and sandy islets (cays) remaining after an old volcanic island sinks beneath the ocean surface.

Wilkes Expedition

An American expedition (1838–1842) led by Lt. Charles Wilkes that mapped 1,500 miles of Antarctica and collected 10,000 biological specimens.

Challenger Expedition

A major British oceanographic voyage (1872–1876) led by Charles Thompson that explored the global ocean for 3 ½ years.

Alvin

A deep-sea submersible operated by Woods Hole Oceanographic Institution capable of diving miles beneath the ocean surface.

Ed Ricketts

Pioneering marine biologist who studied tide-pool communities as interconnected ecosystems and served as the inspiration for 'Doc' in John Steinbeck's Cannery Row.

Bongo Net

A paired net system towed behind a research vessel to sample zooplankton from open water.

ROV (Remotely Operated Vehicle)

A tethered underwater robotic vehicle operated remotely from a surface vessel.

AUV (Autonomous Underwater Vehicle)

An untethered robotic device that travels underwater independently without requiring real-time human control.

SONAR

Technology that detects underwater features and objects by analyzing sound echo reflections.

Electromagnetic Spectrum

The complete range of all frequencies and wavelengths of electromagnetic radiation.

Ocean Gyres

Large, dominant circular surface current systems driven by global wind patterns.

Upwelling

The oceanographic process in which wind pushes surface water offshore, drawing deep, cold, nutrient-rich water up to the surface.

Induction

A method of logical reasoning that moves from specific observations to a generalized conclusion.

Deduction

A method of logical reasoning that applies a general rule or principle to predict a specific outcome.

Independent Variable

The single factor in an experiment that is deliberately changed or manipulated by the researcher.

Dependent Variable

The factor that is measured or observed to assess the effect of the independent variable.

Controlled Variables

All conditions in an experiment that must remain constant and unchanged across test groups.

Controlled Experiment

An experimental setup in which all variables are kept equal between groups except for the one factor being tested.

Control Group

An unmanipulated experimental setup used as a baseline standard for comparison.