Marine Science Chapter 3 Ocean Chemistry and Structure

Ocean temperature, salinity, dissolved gases, and density are the same in all parts of the ocean.

• True

• False

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NGSS.MS-ESS2-6

NaCl (Sodium chloride) is the only kind of salt in the ocean.

• True

• False

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NGSS.MS-PS1-1

Oxygen (O₂), Carbon dioxide (CO₂), and Nitrogen (N₂) are all _________________________ that are important to marine life.

• ions

• dissolved gases

• carbohydrates

• carbon compounds

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Substances that are dissolved in a solvent (water) and can be either solids, gases, or other liquids:

• solutes

• solvents

• bases

• lipids

Sodium ions and chloride ions account for about ____________ of ions in seawater.

• 55%

• 65%

• 75%

• 85%

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NGSS.MS-PS1-1

Sodium chloride (NaCl) is an example of a dissolved _________________.

• liquid

• solid

• gas

• acid

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NGSS.MS-PS1-1

Chloride ions make up 55.03% of the amount of salt present anywhere in the ocean. This is an example of the:

• Theory of evolution by natural selection

• Laws of motion

• Rule of constant proportions

• Cell theory

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NGSS.MS-PS1-1

Carbon dioxide (CO₂) enters the ocean from the ______________________________.

• atmosphere

• photosynthesis of aquatic plants and algae

• melting of sea ice

• freezing of seawater

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NGSS.MS-LS2-3

Carbon dioxide (CO₂) is also produced in the ocean by ______________________________.

• photosynthesis of marine plants

• cellular respiration of marine organisms

• sea water freezing

• increased alkalinity

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Density of seawater is affected by these two factors:

• clarity and color

• hydrogen ions and dissolved oxygen

• transparency and turbidity

• temperature and salinity