Test: 5th Grade Science

1.
About 71% of Earth's surface is covered by water and of that 97% is saltwater located in oceans. The water in the ocean only contains about three to four percent salt. If you wanted to replicate this at home, you could mix six ounces of water with a teaspoon of salt, and it would be the same salinity as ocean water. Oceans become saltier over time as water evaporates, and small amounts of salt are carried to the oceans by rivers.
 
Select which statement is true.

Salt evaporates from ocean water

There is salt in river water

Most of Earth's water is found in clouds

Oceans have equal amounts of salt and water

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