Importance of Earth's Hydrospehre

“Rivers are roads which move, and which carry us whither we desire to go.” 

                                                                                      –Blaise Pascal. 

            As far as we know, the Earth we live on is the only planet that is able to support life. Amongst other factors, Earth is just the right distance from the sun to have temperatures that are suitable for life to exist. Also, the Earth's atmosphere has exactly the right type of gases in the right amounts for life to survive. Our planet also has water on its surface, which is something very unique. In fact, Earth is often called the 'Blue Planet' because most of it is covered in water. This water is made up of freshwater in rivers and lakes, the saltwater of the oceans and estuaries, groundwater and water vapour. Together, all these water bodies are called the hydrosphere. The hydrosphere plays an important role because it interacts with, and is influenced by, all the other earth spheres. It is the home for many plants and animals.

            It is so easy sometimes to take our hydrosphere for granted and we seldom take the time to really think about the role that this part of the planet plays in keeping us alive. Water is a part of living cells. Each cell in a living organism is made up of almost 75% water, and this allows the cell to function normally. In fact, most of the chemical reactions that occur in life, involve substances that are dissolved in water. Without water, cells would not be able to carry out their normal functions and life could not exist. 

Water also provides a habitat. The hydrosphere provides an important place for many animals and plants to live. Many gases, nutrients, nitrite and ammonium ions, as well as other ions are dissolved in water. The presence of these substances is critical for life to exist in water.

Water regulates climate. One of water's unique characteristics is its high specific heat. This means that water takes a long time to heat up and also a long time to cool down. This is important in helping to regulate temperatures on earth so that they stay within a range that is acceptable for life to exist. Ocean currents also help to disperse heat.

Water provides human needs. Humans use water in a number of ways. Drinking water is obviously very important, but water is also used domestically and in industry. Water can also be used to generate electricity through hydropower.

Water is life. We would die in three days without water. Our body can’t go on with its complex processes without water that will help metabolize and circulate nutrients, oxygen and blood in our body. With the growing pollution in our environment, our water system is imperilled. Dams and watersheds have gone dry, rivers become polluted and our drinking water has been contaminated with chemicals. Water is very important so we should take care of it, because without it life would be miserable.

Advantages and Disadvantages of Science and Technology

The advancements in science and technology are very important in our daily life to do our work easily and to have a simpler life. It is also used in agriculture to have a good harvest and to increase our productivity. Because of the curiosity and intelligence of human being in this world, who created the technology that we used today. Every generations to come, the technology will develop and they will innovate this to make our life easier and to provide the needs of people in the community. How does the human intellect make it all? That’s the question that I want to be answered when it talks about technology. Even me I can’t explain how, I just know that they used the minerals, energy and other resources in this world. I’m thankful to have this technology because it helps me a lot especially in my studies and not only me, but also the other people who existed in this kind of generation.

Science and technology brought us a lot of benefits to us. It gives us a comfort living, a beautiful home and healthy foods. In the field of medicine, there are many medical researches to help find cures or treatment for diseases such as cancer, AIDS, Alzheimer’s and leukemia that can’t be cured in the past generation.

Science and technology made our life easier because of the invention of the technology. Doing work or job at workplaces is easier because of the invention of computers. Computers are very popular inventions which are commonly used nearly everyday for many reasons. It is used for financial things and to keep files in a folder on the computer rather than using cabinets for keeping the files. Even though it is very useful to us, it has also negative effects on the people who used it. One of these is the radiation that affects the health of a person which can also damage our eyes.

Science and technology brought us a lot of things that we used today but there are disadvantages of science and technology as well like the effects of nuclear technology. When it goes to the bad person, they will use it to kill people. They also used the technology for pornography websites, hacking, cyber crime and stealing of information. Technology is also used by the military to kill people quicker and more efficient than ever before, which give a shorter life span. The industrialization and development causes the pollution to our world. Examples of these are the smoke from vehicles and factory that will destroy the ozone layer. As a result, people suffer illness and diseases like cancer.