Answer:
volcanoes and rivers
Explanation:
the salt from the ocean come from fresh water rivers , and volcanic eruptions spew out water vapor and and carbon dioxide and other gasses like chlorine. the chlorine will then dissolve into the ocean and combine with sodium to get sodium chloride.
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Because the time span of Earth's past is so great, geologists use the geologic time scale to show Earth's history.
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A lake community with four trophic levels suddenly suffers from algal blooms. Using the strategy of biomanipulation, an ecologist may propose removing zoonplankton.
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For a scientific theory to be valid, i<span>t must be well tested, it must be widely accepted, and it must explain the observable facts.
A scientific theory is confirmed through observation and are usually widely accepted. </span>