Multiple choice

Which of the following pairs is not correctly matched?

  1. Rain water - Purest form of water

  2. River water - Largest source of water on Earth

  3. Lakes - A large area of water surrounded by lands

  4. Seawater - Source of common salt
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Oceans are the largest source of surface water, comprising approximately 97 percent of Earth's surface water.

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