Ocean Water

What conditions would most likely cause a decrease in the salinity of ocean water?

• high rates of evaporation

• freezing of glaciers

• extremely hot weather

• a river flowing into the sea

What conditions would cause an increase in the salinity of ocean water?

• high rates of evaporation

• thawing of glaciers

• cold weather

• a river flowing into the sea

Scientists have determined the average salinity of ocean water to be equal to__________.

• 3.45 g/kg

• 34.5 g/kg

• 3.45 g/mL

• 34.5 g/mL

What is the best description of the salinity of ocean water?

• number of grams of salt in one kilogram of water

• number of grams of dissolved chlorine in one kilogram of water

• number of grams of mineral salt in one liter of water

• number of milligrams of dissolved sodium chloride in one liter of water

Which statement best explains the relationship between an area's geography and the temperature of its surface water?

• Areas at high latitudes have the warmest water because their days are the longest.

• Areas at high latitudes have the warmest water because they have the longest seasons.

• Areas at low latitudes have the warmest water because they receive the most direct sunlight.

• Areas at low latitudes have the warmest water because they have the least change in temperature throughout the year.

Tags

NGSS.MS-ESS2-6

Which statement best describes how the temperature of the ocean's surface water varies?

• Areas at high latitudes have the coldest water.

• Areas with a low salinity have the coldest water.

• Areas close to the poles have the warmest water.

• Areas with a high density have the warmest water.

Tags

NGSS.MS-ESS2-6

Why are people not able to scuba dive to the deepest parts of the ocean?

• As you go deeper into the ocean, temperature decreases and pressure increases too much for a body to withstand.

• As you go deeper into the ocean, temperature increases and pressure increases too much for a body to withstand.

• As you go deeper into the ocean, temperature and pressure increase too much for a body to withstand.

• As you go deeper into the ocean, temperature and pressure decrease too much for a body to withstand.

Water with high salinity has what type of density?

• Low

• High

What is the definition of salinity?

• The temperature of water.

• The measure of salt in water.

• The amount of water in the ocean.

• The amount of evaporation taking place.

Check all of the ways salinity can increase.

• Ocean water freezing near the poles.

• Fresh water entering the ocean via runoff.

• Precipitation occurring over the ocean mixing the rain and ocean water together.

• High amounts of ocean water evaporating near the equator.

• Rain entering a freshwater lake.

Tags

NGSS.MS-ESS2-4