When present in large volumes, what color hue can water emit?

• Correct Answer: blue
• yellow
• white
• pink

Explanation: Water is truly an amazing substance. It can exist in all three states under normal pressures and temperatures. At room temperature, it is a tasteless, odorless, colorless liquid, although it exhibits a blue hue when present in large volumes. Approximately 70% of the Earth’s surface is covered in water. For a small molecule, water molecules are highly attracted to one another, due to particularly strong hydrogen bonds. This leads to a number of properties, such as a relatively high surface tension. Unlike most other substances, water expands when it freezes. Water is also able to absorb relatively large amounts of heat with only minimal changes in temperature. This can be seen on a small scale, such as the coolant in your car, or on a larger scale, such as the more moderate climates in coastal areas. The water in the oceans acts as a tremendous heat sink, which influences global weather patterns. The clouds that form above lakes and oceans originate from the evaporation of lake and ocean water. They are byproducts of water’s thermal regulating capacity. Additionally, water is not only found here on Earth; scientists have found evidence of water on a number of extraterrestrial planets. In this lesson, we are going to take a look at this unique and important substance.

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