Oceanography Vocabulary MCQ Quiz! Trivia

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  • 1/17 Questions

    Oceanography is the scientific study of the ocean and seas.

    • True
    • False
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About This Quiz


How much do you know about oceanography? Do you want to try and pass this quiz? Oceanography is the study of the physical and biological characteristics of the ocean. It is essential to earth science, covering a wide array of topics, including ecosystem dynamics, ocean currents, waves, and plate tectonics. Concerned with oceans, including marine, An oceanographer is a person who studies the ocean, marine, geology, and physics. Take this quiz and learn more about oceanography.

Oceanography Vocabulary MCQ Quiz! Trivia - Quiz

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  • 2. 

    The measure of the dissolved salts in the water.

    Explanation
    Salinity refers to the measure of dissolved salts in water. It is a quantitative measurement that indicates the concentration of salts, such as sodium, chloride, and magnesium, in a given body of water. Salinity is typically expressed in parts per thousand (ppt) or as a percentage. This measurement is crucial in various fields, including oceanography, hydrology, and agriculture, as it affects the water's density, freezing point, and ability to support aquatic life. Additionally, salinity levels can impact the taste, quality, and usability of water for different purposes, such as drinking, irrigation, and industrial processes.

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  • 3. 

    The temperature at which a solution turns from liquid to gas is a boiling point.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The boiling point of a solution refers to the temperature at which it changes from a liquid state to a gaseous state. This process is known as boiling. Therefore, the statement that the temperature at which a solution turns from liquid to gas is a boiling point is true.

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  • 4. 

    Tiny, colonial sea animals that form a large part of Earth's reefs.

    Correct Answer
    coral
    Explanation
    Coral refers to tiny, colonial sea animals that play a significant role in the formation of Earth's reefs. These organisms have a calcium carbonate skeleton and live in colonies, creating massive structures known as coral reefs. Coral reefs are diverse ecosystems that provide habitats for numerous marine species and protect coastlines from erosion. Due to their beauty and ecological importance, coral reefs are highly valued and studied by scientists and are popular tourist destinations for diving and snorkeling.

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  • 5. 

    Photosynthesizing microorganisms that float freely in the ocean's surface waters, make up the base of the ocean's food chain, and are the primary energy source for the marine ecosystem.

    Correct Answer
    phytoplankton
    Explanation
    Phytoplankton are photosynthesizing microorganisms that float freely in the ocean's surface waters. They play a crucial role in the marine ecosystem by serving as the base of the ocean's food chain. As primary producers, they convert sunlight, carbon dioxide, and nutrients into organic matter, providing energy for other organisms in the food web. Without phytoplankton, the marine ecosystem would collapse as they are the primary energy source for many marine organisms. Therefore, phytoplankton are essential for the sustainability and functioning of the ocean's ecosystem.

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  • 6. 

    An aqueous solution that acts to stabilize changes in pH.

    Correct Answer
    buffer
    Explanation
    A buffer is a solution that helps maintain a stable pH level by resisting changes in acidity or alkalinity. It contains a weak acid and its conjugate base (or a weak base and its conjugate acid) which can accept or donate hydrogen ions to prevent drastic shifts in pH when an acid or base is added. Buffers are commonly used in biological and chemical laboratories to maintain the optimal pH conditions for various reactions and processes. They play a crucial role in maintaining the stability and functionality of biological systems and chemical reactions.

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  • 7. 

    The layer of ocean directly beneath the mixed layer, in which the temperature decreases rapidly.

    Correct Answer
    thermocline
    Explanation
    The thermocline is the layer of the ocean directly beneath the mixed layer where the temperature decreases rapidly. This layer acts as a barrier between the warm surface waters and the colder deeper waters. The rapid temperature change in the thermocline is due to the decrease in sunlight penetration and the mixing of different water masses with varying temperatures. The thermocline plays a crucial role in ocean circulation and the distribution of heat and nutrients in the ocean.

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  • 8. 

    The temperature at which a solution turns from liquid to solid.

    Correct Answer
    freezing point
    Explanation
    The freezing point is the temperature at which a solution changes from a liquid state to a solid state. It is the point at which the molecules in the solution slow down and arrange themselves into a solid structure. At temperatures below the freezing point, the solution will remain in a solid state, while at temperatures above the freezing point, it will exist as a liquid. The freezing point is a characteristic property of a substance and can be used to identify and differentiate between different substances.

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  • 9. 

    A vent that spews water of about 380 degrees Celsius from volcano-like chimneys located on the ocean floor.

    • Buffer

    • Black smoker

    • Boiling point

    • Coral

    Correct Answer
    A. Black smoker
    Explanation
    A black smoker is a vent located on the ocean floor that releases water at a high temperature of about 380 degrees Celsius. These vents resemble chimneys and are found near volcanic activity. The term "black smoker" refers to the dark color of the minerals and metals that are deposited around the vent due to the high temperature of the water.

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  • 10. 

    The microscopic animals found in ocean water that eat phytoplankton or smaller zooplankton.

    Correct Answer
    zooplankton
    Explanation
    Zooplankton refers to microscopic animals that are found in ocean water and feed on phytoplankton or smaller zooplankton. These organisms play a crucial role in marine ecosystems as they serve as a food source for larger organisms and help maintain the balance of the food chain. Zooplankton includes various species such as copepods, krill, and jellyfish larvae, among others. They are essential in nutrient cycling and serve as indicators of the health and productivity of marine environments.

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  • 11. 

    A body of water with distinct properties based on where it originated.

    Correct Answer
    water mass
    water masses
    Explanation
    A body of water with distinct properties based on where it originated is referred to as a water mass or water masses. This term is used to describe different bodies of water that have unique characteristics, such as temperature, salinity, and density, depending on their origin. These distinct properties can be influenced by factors like ocean currents, mixing processes, and geographical location. By categorizing bodies of water into water masses, scientists can better understand and study the different characteristics and behaviors of these bodies of water.

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  • 12. 

    The differences in electrical charge at the ends of a molecule; for example, a water molecule.

    Correct Answer
    polarity
    Explanation
    Polarity refers to the differences in electrical charge at the ends of a molecule. In the case of a water molecule, it is polar because the oxygen atom has a slightly negative charge and the hydrogen atoms have slightly positive charges. This separation of charges creates a polarity in the molecule, making it attracted to other polar molecules and allowing it to form hydrogen bonds.

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  • 13. 

    A chemical bond in which the positively charged hydrogen atom of one molecule is attracted to the negatively charged atom of another molecule.

    Correct Answer
    hydrogen bonding
    hydrogen bond
    Explanation
    Hydrogen bonding refers to a type of chemical bond where the positively charged hydrogen atom in one molecule is attracted to the negatively charged atom in another molecule. This attraction is typically between hydrogen and elements such as oxygen, nitrogen, or fluorine. Hydrogen bonding is a weak bond compared to covalent or ionic bonds, but it plays a crucial role in various biological and chemical processes. The term "hydrogen bond" is often used interchangeably with "hydrogen bonding" to describe this type of interaction.

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  • 14. 

    The surface layer of ocean water.

    Correct Answer
    mixed layer
    Explanation
    The surface layer of ocean water is referred to as the mixed layer. This layer is characterized by its relatively uniform temperature and salinity due to the mixing of surface waters by wind, waves, and currents. The mixing process occurs as a result of turbulence, which helps to distribute heat, nutrients, and dissolved gases throughout the mixed layer. The mixed layer plays a crucial role in regulating the exchange of heat, moisture, and gases between the ocean and the atmosphere, making it an important component of the oceanic and climatic systems.

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  • 15. 

    A one-celled protist with a delicate, thin shell made of silica.

    • Diatom

    • Coral

    • Phytoplankton

    • Zooplankton

    Correct Answer
    A. Diatom
    Explanation
    A diatom is a one-celled protist that has a delicate, thin shell made of silica. This characteristic shell, called a frustule, provides protection and support for the diatom. Diatoms are commonly found in aquatic environments, such as oceans, lakes, and rivers. They are photosynthetic organisms, belonging to the group of phytoplankton, and play a crucial role in the food chain as primary producers. Due to their unique shell structure, diatoms have diverse shapes and sizes, and they are known for their intricate and beautiful patterns.

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  • 16. 

    A homogeneous mixture of two or more substances in which the solvent or dissolving medium is water.

    Correct Answer
    aqueous solution
    Explanation
    An aqueous solution refers to a homogeneous mixture where water is used as the solvent or dissolving medium. In this type of solution, other substances or solutes are dissolved in water, resulting in a uniform composition throughout the mixture. Aqueous solutions are commonly encountered in various fields, such as chemistry, biology, and everyday life. They play a crucial role in many chemical reactions, biological processes, and industrial applications due to the unique properties of water as a universal solvent.

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  • 17. 

    Free-swimming marine life, such as fish, reptiles, whales, squid, and jellyfish.

    • Zooplankton

    • Phytoplankton

    • Nekton

    • Black smoker

    Correct Answer
    A. Nekton
    Explanation
    Nekton refers to the free-swimming marine organisms like fish, reptiles, whales, squid, and jellyfish. This term is used to describe animals that are capable of actively swimming and moving against the ocean currents. Nektonic organisms have more control over their movement compared to planktonic organisms like zooplankton and phytoplankton, which drift passively with the currents. Black smoker, on the other hand, refers to hydrothermal vents on the ocean floor.

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  • Mar 21, 2023
    Quiz Edited by
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  • Dec 03, 2010
    Quiz Created by
    Dalenealey
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