Oceanography and World Ocean

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Questions and Answers

What is the average salinity range in the open ocean?

  • 25% to 30%
  • 20% to 25%
  • 30% to 35%
  • 35% to 37% (correct)

Which ocean contains slightly more than half of the water in the world ocean?

  • Arctic Ocean
  • Atlantic Ocean
  • Pacific Ocean (correct)
  • Indian Ocean

What are the two principal elements that contribute to the ocean's salinity?

  • Oxygen and Nitrogen
  • Chlorine and Sodium (correct)
  • Hydrogen and Helium
  • Carbon and Calcium

What is the greatest average depth of the Pacific Ocean?

<p>12,900 meters (A)</p> Signup and view all the answers

Why are ocean water temperatures warmest at the surface?

<p>Because of solar energy (B)</p> Signup and view all the answers

What is considered the primary source of water in the oceans as well as in the atmosphere?

<p>Outgassing from volcanism (D)</p> Signup and view all the answers

What is the main purpose of seawalls in addressing shoreline erosion?

<p>Prevent waves from reaching the shore (C)</p> Signup and view all the answers

Which action does beach nourishment involve in combating shoreline erosion?

<p>Adding sand to replenish the beach (C)</p> Signup and view all the answers

What type of coast would likely form due to a drop in sea level?

<p>Emergent coast (D)</p> Signup and view all the answers

What is the primary purpose of ozone in the atmosphere?

<p>To absorb ultraviolet radiation (D)</p> Signup and view all the answers

In which layer of the atmosphere does the environmental lapse rate typically result in decreasing temperature with altitude?

<p>Troposphere (A)</p> Signup and view all the answers

What is the primary cause of the daily cycle of daylight and darkness on Earth?

<p>The speed of Earth's rotation (D)</p> Signup and view all the answers

Which mechanism of heat transfer involves the movement of a substance from one place to another?

<p>Convection (A)</p> Signup and view all the answers

What is the main function of groins in shoreline erosion management?

<p>To trap moving sand along the shore (D)</p> Signup and view all the answers

Which layer exhibits warming due to ozone absorption of ultraviolet radiation?

<p>Stratosphere (B)</p> Signup and view all the answers

What causes Earth's changing seasons?

<p>The angle of Earth's axis and its orientation relative to the Sun. (C)</p> Signup and view all the answers

In which zone does the thermocline occur?

<p>Deep zone (A)</p> Signup and view all the answers

What lies below the halocline?

<p>Small salinity changes (D)</p> Signup and view all the answers

Which oceanic feature originates on the continental slope?

<p>Submarine canyons (A)</p> Signup and view all the answers

What is the most level place on Earth according to the text?

<p>Abyssal plains (D)</p> Signup and view all the answers

Where are coral reefs primarily constructed from?

<p>Corals and certain algae (C)</p> Signup and view all the answers

What do atolls primarily form from?

<p>Sinking volcanic islands (A)</p> Signup and view all the answers

Which type of seafloor sediment consists of mineral grains weathered from continental rocks?

<p>Terrigenous sediment (B)</p> Signup and view all the answers

What is the driving force for the ocean's surface currents?

<p>Coriolis effect (D)</p> Signup and view all the answers

What causes the deflection of free-moving objects to the right in the Northern Hemisphere and to the left in the Southern Hemisphere?

<p>Coriolis effect (D)</p> Signup and view all the answers

Which two factors are most significant in creating a dense mass of water in deep-ocean circulation?

<p>Temperature and salinity (B)</p> Signup and view all the answers

What causes the daily rise and fall in the elevation of the ocean surface at a specific location?

<p>Gravitational attraction of the Moon (B)</p> Signup and view all the answers

What do spits, baymouth bars, and tombolos have in common?

<p>They are features formed by beach drift and longshore currents (C)</p> Signup and view all the answers

What is responsible for the formation of sea arches?

<p>Erosion of headlands (D)</p> Signup and view all the answers

What are waves of oscillation in the open sea characterized by?

<p>Circular particle orbits (B)</p> Signup and view all the answers

What type of barometer measures atmospheric pressure using inches of mercury?

<p>Aneroid barometer (C)</p> Signup and view all the answers

What is the direction of winds around a high-pressure system in the Northern Hemisphere?

<p>Clockwise and inward (B)</p> Signup and view all the answers

Which force slows the movement of wind and alters its direction by interacting with Earth's surface?

<p>Friction with Earth's surface (B)</p> Signup and view all the answers

What is the main reason why cloud formation and precipitation are unlikely in high-pressure centers like anticyclones?

<p>Descending air is compressed and warmed (A)</p> Signup and view all the answers

What global wind system is associated with the region between 30-60 degrees latitude?

<p>Westerlies (D)</p> Signup and view all the answers

Which type of wind is created when air descends the leeward side of a mountain, warming through compression?

<p>Chinook wind (C)</p> Signup and view all the answers

What instrument is used to measure wind direction?

<p>Wind vane (A)</p> Signup and view all the answers

'Santa Ana' winds are most likely to occur in which geographic area?

<p>'Leeward side' of mountains (D)</p> Signup and view all the answers

'Fair' weather conditions are typically expected in which type of pressure center?

<p>'High' pressure system (C)</p> Signup and view all the answers

'Westerlies' are known to be interrupted by the migration of which weather systems?

<p>'Cyclones' and 'anticyclones' (D)</p> Signup and view all the answers

What is the main difference between electromagnetic waves?

<p>Their ability to transmit energy through space (C)</p> Signup and view all the answers

Which portion of the electromagnetic spectrum is visible to humans?

<p>Visible light waves (C)</p> Signup and view all the answers

What happens to the atmosphere as you move higher in altitude in the troposphere?

<p>It gets colder because it is heated from the ground up. (D)</p> Signup and view all the answers

Which gases are primarily responsible for absorbing long-wave terrestrial radiation in the atmosphere?

<p>Water vapor and carbon dioxide (A)</p> Signup and view all the answers

What is one of the significant factors that influence global warming according to the text?

<p>Increase in greenhouse gases like carbon dioxide (B)</p> Signup and view all the answers

What is the general term used to describe the amount of water vapor in the air?

<p>Relative humidity (D)</p> Signup and view all the answers

What is relative humidity?

<p>The ratio of air's water vapor content to its water vapor capacity at a given temperature (D)</p> Signup and view all the answers

What happens to air's relative humidity when it's cooled?

<p>It increases (D)</p> Signup and view all the answers

What does dew point represent?

<p>The temperature at which air would have to be cooled to reach saturation (C)</p> Signup and view all the answers

What is responsible for basic cloud formation according to the text?

<p>The cooling of air as it rises and expands (B)</p> Signup and view all the answers

What is one of the mechanisms that can initiate the vertical movement of air?

<p>Frontal wedging (B)</p> Signup and view all the answers

At what rate does air cool when it rises at the wet adiabatic rate?

<p>5C to 9C per 1000 meters (C)</p> Signup and view all the answers

Which type of clouds are high, white, thin, and wispy?

<p>Cirrus clouds (C)</p> Signup and view all the answers

What is the definition of fog based on the given text?

<p>A cloud with its base close to the ground (C)</p> Signup and view all the answers

How are clouds classified based on their appearance?

<p>By the shape of the clouds (D)</p> Signup and view all the answers

What must happen for condensation to occur?

<p>Air must be cooled below its dew point (C)</p> Signup and view all the answers

How is atmospheric pressure measured in meteorology?

<p>Millibars on a weather map (D)</p> Signup and view all the answers

What happens to air pressure with increasing altitude?

<p>Decreases with altitude (B)</p> Signup and view all the answers

What is the main factor that differentiates stable and unstable air?

<p>Rate of temperature decrease with altitude (D)</p> Signup and view all the answers

What are isobars on a weather map used to connect?

<p>Places of equal air pressure (C)</p> Signup and view all the answers

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