Water On Earth

Water is essentially two hydrogen atoms and one oxygen atom linked together in a liquid state. Water, despite its seeming simplicity, possesses surprising qualities. The properties of water include expanding when frozen, having high surface tension (because of the polar nature of the molecules, they tend to cling together), and many more characteristics. Without water, life on Earth may not have been able to exist, and it would almost certainly not have had the incredible complexity and diversity that we witness today.

The Distribution of Water on the Planet

As 97 percent of the globe’s water is found in the oceans, fresh water (water with low concentrations of salts) accounts for only 3 percent of total water on the planet. The huge glaciers and ice sheets of Greenland contain the great majority of the world’s fresh water, which is trapped as ice. Reservoirs are places where water can be stored, such as the ocean, glaciers, ponds, or even the atmosphere, and are distinguished from other types of storage. A water molecule may travel through a reservoir in a short period of time or may remain for an extended period of time. The amount of time a molecule spends in a reservoir is referred to as its resident time in the reservoir.

The Hydrologic Cycle 

The Hydrologic Cycle is a term used to describe the flow of water through a system.

It is possible for water molecules to cycle across practically any part of the planet due to the unique qualities of water. During the early history of the Earth, the water molecule contained in your glass of water today could have erupted from a volcanic eruption. After all of those billions of years, the molecule is likely to have spent some of that time in a glacier or deep underground. The molecule was very certainly high in the atmosphere, and it may have been deep within the stomach of a dinosaur. What will happen to that water molecule next?

Water in Three Different States

Water is the only substance on Earth that can be found in all three states of matter – as a solid, a liquid, and a gas – and is therefore the most versatile. (In addition, Earth is the only planet on which water can be found in all three states at once.) Because of the wide variations in temperature seen in different parts of the world, all three phases may be present in a single area or region. Solid (ice or snow), liquid (water), and gas are the three phases of matter (water vapor). Take a look at the ice, water, and clouds.

Streams and rivers can be formed as water falls from the sky as rain, and these waterways can flow downward to the oceans and lakes. Water that falls as snow on a mountainside may remain there for several months. It is possible for snow to become incorporated into glacial ice, where it may persist for hundreds or thousands of years. Sublimation, the process by which a solid turns straight into a gas without first becoming a liquid, is capable of re-introducing snow and ice into the surrounding atmosphere. Although you are unlikely to have witnessed water vapor sublimating from a glacier, it is possible that you have witnessed dry ice sublimate in the atmosphere.

After a period of time, the snow and ice gently melt and turn into liquid water, supplying a continual flow of fresh water to the streams, rivers, and lakes below. A water droplet that falls as rain could become a part of a stream or a lake, depending on its location. Eventually, water will evaporate off the surface of the earth and re-enter the atmosphere.

During the rainy season, water may seep through dirt and rock beneath the soil’s surface, permeating ground pores and entering the Earth’s groundwater system. Groundwater penetrates aquifers, which have the potential to store fresh water for hundreds of years. Alternatively, the water may rise to the surface through springs or make its way back to the oceans, depending on the circumstances.

Water is essential for the survival of plants and animals, and they also play an important role in the water cycle. In addition to absorbing water from the soil, plants also emit significant volumes of water vapor into the atmosphere through the leaves of their plants.

Water Cycle

• Evaporation is the process through which water from the surface of the ground, such as oceans, seas, rivers, ponds, lakes, wells, and other similar water bodies, rises to the surface of the atmosphere in the form of gas. As a result, when the temperature of the earth rises over its average temperature (heats), water condenses into a gaseous condition and is carried upward into the sky.
• Condensation occurs when water vapor or droplets of water condensate in the atmosphere as a result of a reduction in temperature, resulting in the water vapor or droplets of water returning to the clouds in the form of water vapors. This process is referred to as condensation.
• The formation of precipitation occurs when water vapor becomes too heavy to escape the atmosphere and fall back to the earth’s surface in the form of rain, snow, or sleet. Precipitation is the term used to describe the process by which water fills water bodies on the earth’s surface, converting them from a gaseous state to a liquid state and then pouring down. The water cycle is the term used to describe the process of this cycle repeating itself over and over again.

Conclusion 

Unlike artificial bodies of water, natural bodies of water such as rivers, lakes, and seas contain air that has been dissolved in them. This dissolved air is essential for the survival of aquatic species because it provides them with essential nutrients. The photosynthesis of aquatic plants, which is required for food preparation, makes use of dissolved carbon dioxide to generate energy. Marine organisms extract calcium carbonate from calcium bicarbonate in order to build their shells, which are made of calcium carbonate. Because salts in water offer the necessary nutrients for our bodies, they are absorbed via our skin, which is why we should drink plenty of water.