Why the Sea Is Salty

How does salt get into the ocean?

• It comes from glaciers.

• It comes from the rain that runs off of rocks and land into rivers.

• Someone poured it in the ocean.

• It is made from sand.

Tags

NGSS.MS-ESS2-4

How much salt is in something is called_____________

• Salinity

• Evaporation

• Seamount

Which term describes the amount of salt in the water?

• temperature

• salinity

• buoyancy

• depth

What is the primary reason the sea is salty?

• Evaporation of water leaves salt behind

• Rivers carry salt to the sea

• Salt is produced by marine organisms

• Volcanic activity under the sea

Which process contributes to the salinity of the ocean by removing water and leaving salts behind?

• Condensation

• Evaporation

• Precipitation

• Sublimation

What is the average salinity of seawater?

• 1%

• 3.5%

• 5%

• 7%

Which element is most abundant in sea salt?

• Potassium

• Calcium

• Sodium

• Magnesium

How do rivers contribute to the ocean's salinity?

• By carrying dissolved salts from rocks

• By depositing sand and silt

• By increasing water temperature

• By supporting marine life

What role do hydrothermal vents play in ocean salinity?

• They decrease salinity by adding fresh water

• They increase salinity by adding dissolved minerals

• They have no effect on salinity

• They remove salt from the ocean

Which of the following is a method scientists use to measure the salinity of seawater?

• Thermometer

• Barometer

• Refractometer

• Anemometer