Cheers !!! This is my first blog, created on 24 September 2012. It is dedicated for Primary School Students (for better understanding of science subject, theories, concepts and facts).
The theme used in my blog design is "H2O" or "Water". This is in-line with the science phenomena known as "Water Cycle" which I will explain in later stage. Thanks.
The water cycle, also known as the hydrological cycle or H2O cycle, describes the continuous movement of water on, above and below the surface of the Earth.
Although the balance of water on Earth remains fairly constant over
time, individual water molecules can come and go, in and out of the atmosphere. The water moves from one reservoir to another, such as from river to ocean, or from the ocean to the atmosphere, by the physical processes of evaporation, condensation, precipitation, infiltration, runoff, and subsurface flow. In so doing, the water goes through different phases: liquid, solid (ice), and gas (vapor).
The water cycle involves the exchange of heat, which leads to temperature
changes. For instance, when water evaporates, it takes up energy from
its surroundings and cools the environment. When it condenses, it
releases energy and warms the environment. These heat exchanges
influence climate.
By transferring water from one reservoir to another, the water cycle
purifies water, replenishes the land with freshwater, and transports
minerals to different parts of the globe. It is also involved in
reshaping the geological features of the Earth, through such processes
as erosion and sedimentation. Finally, the water cycle figures significantly in the maintenance of life and ecosystems on Earth.
