Chapter 15 Ocean Water and Ocean Life

The proportion of dissolved substances in seawater is usually expressed in

• parts per hundred

• parts per thousand

• parts per ten thousand

• parts per million

Tags

NGSS.MS-PS1-2

Which of the following is a source of dissolved substances in the ocean?

• chemical weathering of rocks

• evaporation of water from the seas and ocean

• excretions from marine organisms

• melting icebergs and sea ice

How do elements such as chlorine, bromine, sulfur, and boron get into the ocean?

• runoff from rivers and streams

• excretions from marine organisms

• volcanic eruptions

• chemical weathering of rocks

Which of the following processes does NOT decrease the salinity of seawater?

• runoff

• solar radiation

• evaporation

• weathering

Differing amounts of solar radiation across Earth's latitude affect the ocean's

• salinity in the thermocline

• density at the surface

• temperature at the surface

• density in the thermocline

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NGSS.MS-ESS2-6

Which of the following occurs when the ocean's salinity increases?

• Density increases

• Density decreases

• Temperature increases

• Temperature decreases

Which of the following is the most important factor affecting seawater density?

• chemical weathering

• solar radiation

• temperature

• latitude

At least 80 percent of ocean water is included in the

• transition zone

• thermocline

• surface mixed zone

• deep zone

The three-layered structure of the open ocean does NOT exist

• in middle latitudes

• in high latitudes

• in low latitudes

• at the equator

Marine organisms can be classified according to

• where they live

• what they eat

• their specific body parts

• how they reproduce