<span>Salt in the ocean comes from rocks on land. The rain that falls on the land contains some dissolved carbon dioxide from the surrounding air. This causes the rainwater to be slightly acidic due to carbonic acid </span>
Salt in the ocean comes from rocks on land. The rain that falls on the land contains some dissolved carbon dioxide from the surrounding air. This causes the rainwater to be slightly acidic due to carbonic acid (which forms from carbon dioxide and water). ... Sodium and Chloride are 'salty.
The line that shows the value of the match its the second one "…it was a long, long time before they learned how to kindle one easily". The match allows humankind to handle fire easily.
