Sea salt

The video explains the importance of salt in our diet and its primary sources, including mining and seawater. It describes seawater as a solution where salt is dissolved and outlines the industrial process of extracting salt by evaporating seawater in shallow basins using solar heat. The resulting salt crystals are collected, cleaned, and processed for consumption.

What is one method of obtaining salt mentioned in the video?

• Harvesting from trees

• Growing in fields

• Mining from underground rock

• Extracting from the air

What is seawater classified as in the video?

• A pure substance

• A suspension

• A solution

• A compound

In seawater, what happens to the salt?

• It evaporates

• It dissolves in water

• It remains visible

• It becomes a gas

How is salt extracted from seawater on an industrial scale?

• By using large fans

• By chemical reactions

• By freezing the water

• By solar evaporation in shallow basins

What is done to the salt crystals after they are collected?

• They are used as is

• They are cleaned and processed

• They are melted

• They are discarded