Question

most of earths surface is covered by salt water located in oceans. ocean water contains between three percent and four percent salt. that is about as salty as one teaspoon of salt mixed into a six-ounce cup of water. the water in rivers also contains a tiny amount of salt. rivers eventually carry this salt into oceans. as ocean water evaporates, salts and minerals are left behind. over time, the oceans become more and more salty. select all of the true statements. between three percent and four percent of the water on earth is salt water. salt remains in the oceans when ocean water evaporates. ocean water contains equal amounts of salt and water. river water does not contain salt.

Explanation:

1. Analyze the first statement: The passage says most of Earth’s surface is covered by salt water (oceans) and ocean water has 3 - 4% salt, not that 3 - 4% of Earth’s water is salt water. So this is false.
2. Analyze the second statement: The passage states "As ocean water evaporates, salts and minerals are left behind." So salt remains in oceans when ocean water evaporates. This is true.
3. Analyze the third statement: Ocean water has 3 - 4% salt, so salt is a small fraction, not equal to water. This is false.
4. Analyze the fourth statement: The passage says "The water in rivers also contains a tiny amount of salt." So river water does contain salt, making this statement false.

Answer:

The true statement is: Salt remains in the oceans when ocean water evaporates. (The option with the text "Salt remains in the oceans when ocean water evaporates.")