Question

Why is the earth called a blue planet?

Answer 1

Hint: About one fourth of the earth's surface is covered with water, blue from the sky. But again, because of the atmosphere, the earth seems to be fading away, which is far from being a bathing place with a blue face.

Complete answer:
Planet Earth is called the "Blue Planet" because of the amount of water on its surface. Here on Earth, we take liquid water easily; after all, most of our bodies are made up of water. However, liquid water is a rare commodity in our solar system. There is no guaranteed liquid water in our solar system, but it is possible that Jupiter's Europa moon and Saturn Enceladus' moon have their oceans under the frozen crust. And never before has a drop of water been seen in the galaxy. Only a planet of the right size, chemical composition, and space can support the water cycle. Liquid water covers most of the earth. These waters come in many forms, each with its own unique characteristics. Rainfall is actually pure water (containing only H2O with trace elements and other compounds taken from atmospheric dust), while fresh spring water and many lakes and rivers contain dissolved salt. Seawater is high in salt and has a moderate salt content, also called "salt". There are two key points here:
(1) These variations in chemical composition contribute to the biological diversity and biological diversity that characterizes different bodies of water.
(2) salts contribute to the measurement or weight of water which is essential for the formation of water bodies, as discussed below.

Note: The water is very large and very large in our ocean. Oceans cover 71% of the earth's surface and have an average depth of 3,729 feet. As mentioned the common salt is 35 ppt, but this is from 33-37 ppt.