Seawater Properties Temperature Salinity and Unique Features

The video tutorial covers the properties of seawater, focusing on temperature and salinity. It explains how temperature varies with latitude and depth, and how salinity is measured. The Dead Sea is highlighted for its unique conditions, including high salinity and density. The tutorial also discusses how temperature and salinity affect seawater density, and defines important terms related to seawater characteristics.

How does the surface temperature of seawater change from the equator to the poles?

• It fluctuates randomly

• It increases

• It decreases

• It remains constant

What happens to the temperature of seawater as depth increases?

• It fluctuates

• It remains constant

• It decreases

• It increases

What is the salinity of seawater if 40g of salt is dissolved in 1kg of water?

• 4%

• 400%

• 0.4%

• 40%

Which instrument is NOT used to measure the salinity of seawater?

• Salinometer

• Refractometer

• Hydrometer

• Thermometer

Why is it difficult to drown in the Dead Sea?

• Because of its high density

• Because of its low density

• Because of its high temperature

• Because of its low salinity

What is a unique geographical feature of the Dead Sea?

• It is below sea level

• It is above sea level

• It is a freshwater lake

• It is at sea level

How does temperature affect the density of seawater compared to salinity?

• Both have the same effect

• Temperature has a greater effect

• Neither affects density

• Temperature has a lesser effect

What happens to the density of seawater when its temperature decreases?

• Density remains constant

• Density increases

• Density fluctuates

• Density decreases

What is a landlocked sea?

• A sea with high salinity

• A sea with no salt

• A sea with low temperature

• A sea surrounded by land

What is the largest water body on Earth?

• Indian Ocean

• Pacific Ocean

• Arctic Ocean

• Atlantic Ocean