Exploring Ocean Water Temperature and Salinity

The video explains why oceans are salty, tracing the origin of salt to rocks on land. It discusses factors affecting salinity, such as evaporation, rainfall, river inflow, and melting ice. Salinity is measured in parts per thousand, with different seas having varying salinity levels. The video also covers ocean temperature, explaining how it varies with distance from the equator and affects water layers. Finally, it highlights how ice protects marine life in polar regions by acting as a heat insulator.

What is the primary source of salt in the ocean?

• Atmospheric deposition

• Volcanic eruptions

• Rocks on land

• Marine organisms

Which salt is most abundant in ocean water?

• Potassium bromide

• Sodium chloride

• Magnesium sulfate

• Calcium carbonate

How does high temperature affect the salinity of ocean water?

• It has no effect on salinity

• It makes the water fresher

• It decreases salinity

• It increases salinity

What happens to the salinity of ocean water when there is high rainfall?

• Salinity decreases

• Salinity increases

• Salinity fluctuates

• Salinity remains the same

Tags

NGSS.MS-ESS2-4

How is salinity measured?

• Grams per liter

• Parts per thousand

• Milligrams per cubic meter

• Percentage

Which ocean has the highest average salinity?

• Pacific Ocean

• Atlantic Ocean

• Mediterranean Sea

• Indian Ocean

Why does the top layer of ocean water warm up more than the deeper layers?

• Because of convection currents

• Due to the sun's heat

• Because of underwater volcanic activity

• Due to the Earth's core heat

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-6

What is the main difference between heating water in a pot and in the ocean?

• Water in a pot heats from the top

• Water in the ocean heats from the bottom

• Water in a pot heats from the bottom

• Water in the ocean heats evenly

Why does ice float on ocean water?

• Because it is denser than water

• Because of the Earth's gravity

• Because it is lighter than water

• Because of ocean currents

How does ice help protect marine life in polar regions?

• By reflecting sunlight

• By insulating the water below

• By providing nutrients

• By increasing water temperature