Seawater Composition Quiz

What are the most important components of seawater that influence life forms?

• Salinity, temperature, dissolved gases, and pH

• Salinity, temperature, and dissolved gases

• Salinity, temperature, dissolved gases, nutrients, and pH

• Salinity, temperature, dissolved gases, and nutrients

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

What is the average salinity of seawater?

• 35 parts per hundred

• 3.5 parts per hundred

• 3.5 parts per thousand

• 35 parts per thousand

Which type of salt is the majority in seawater?

• Sodium chloride

• Calcium chloride

• Potassium chloride

• Magnesium chloride

What factors can change the salinity in the ocean?

• Evaporation, precipitation, and large river runoff

• Precipitation, large river runoff, and ice freezing

• Evaporation, precipitation, and ice freezing

• Evaporation, large river runoff, and ice freezing

What is the process called that allows water to move in and out of living cells in response to a concentration of dissolved material?

• Diffusion

• Endocytosis

• Osmosis

• Active transport

Which type of marine organisms have no mechanism to control osmosis and their cells have the same salt content as the liquid environment?

• Invertebrate animals

• Marine plants

• Osmotic regulators

• Osmotic conformers

Which layer of the ocean is always one cold temperature and comprises close to 80 percent of all ocean water by volume?

• Deep (bottom) water

• Upper mixed layer

• Main thermocline

• Surface water

Tags

NGSS.MS-ESS2-6

How does seawater temperature affect marine organisms?

• It changes their ability to control their internal body temperature

• It affects their ability to find food

• It changes the reaction rates within their cells

• It affects their ability to reproduce

Tags

NGSS.MS-LS2-4

What is the temperature range of the upper mixed layer in the ocean?

• -2 to +35 degrees C

• 0 to +30 degrees C

• 0 to +35 degrees C

• -2 to +30 degrees C

What is the main factor that determines the temperature of seawater?

• The amount of sun that hits the area

• The presence of marine organisms

• The depth of the water

• The salinity of the water

Tags

NGSS.MS-ESS2-4