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The water cycle is the continuous movement of water on, above, and below the Earth’s surface. It involves evaporation, condensation, precipitation, and runoff, which work together to recycle and distribute the Earth’s water.
The water cycle consists of four major processes: evaporation, condensation, precipitation, and runoff. Evaporation is the process of water changing from a liquid to a gas. This typically occurs when heat is applied to surface water, causing it to turn into water vapor.
Water, substance composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid, and solid states. It is one of the most plentiful of compounds and has the important ability to dissolve many other substances, which was essential to the development of life.
Water covers over 70% of the Earth, cycling from the oceans and rivers to the clouds and back again. It even makes up about 60% of our bodies. But in the rest of the solar system, liquid water...
It was long thought that Earth's water did not originate from the planet's region of the protoplanetary disk. Instead, it was hypothesized water and other volatiles must have been delivered to Earth from the outer Solar System later in its history.
Water is an inorganic compound with the chemical formula H2O. It is a transparent, tasteless, odorless, [c] and nearly colorless chemical substance. It is the main constituent of Earth 's hydrosphere and the fluids of all known living organisms (in which it acts as a solvent [20]).
The popular belief is that the Earth's oceans were formed primarily from water provided by numerous bombardment impacts. The "late veneer hypothesis" contends that most of Earth's water, as well as other volatile compounds, arrived billions of years after the planet had taken shape.
About 4.6 billion years ago, when our solar system was created, a mixture of hydrogen and oxygen atoms joined together to make clouds of hot steam that eventually cooled to form water, which fell to Earth as rain, formed the oceans and carved the continents into shape.
Water is one of the few known substances whose solid form is less dense than the liquid. The plot at the right shows how the volume of water varies with the temperature; the large increase (about 9%) on freezing shows why ice floats on water and why pipes burst when they freeze.
Water is liquid at room temperature so it's able to move around quicker than it is as solid, enabling the molecules to form fewer hydrogen bonds resulting in the molecules being packed more closely together.
Water is a simple molecule consisting of one oxygen atom bonded to two different hydrogen atoms. Because of the higher electronegativity of the oxygen atom, the bonds are polar covalent ( polar bonds ).
Another theory is that Earth simply made its own water. Powerful telescopes have spotted baby exoplanets shrouded in molecular hydrogen. Modeling by one team of scientists suggests that this hydrogen could interact with magma oceans, forming copious amounts of water in the process.
It moves inside the planet, across its surface, and in the atmosphere above. Water in lakes, rivers, and oceans turns into vapor and moves into the air through evaporation. Plants draw water from the soil and return it to the air. Volcanoes release water vapor that was locked deep inside rocks.
About 70% of the surface of our planet Earth is covered in water. We are nestled in our solar system at just the right distance from the Sun for this liquid water to exist. Any farther and that...
Where does water, a giver and taker of life on planet Earth, come from? When I was in junior high school, my science teacher taught us about the water cycle—evaporation from oceans and lakes,...
Water stands as a paramount covalent compound within the realm of chemistry. This molecule is composed of two hydrogen atoms bonded to a single oxygen atom through covalent bonds, a configuration that renders it essential for myriad biological processes and ecological systems.
There are two prevailing theories: One is that the Earth held onto some water when it formed, as there would have been ice in the nebula of gas and dust (called the proto-solar nebula) that...
2-Minute Listen. Playlist. Scientists have long debated whether the Earth's water was here when the planet formed or whether it arrived later. A study suggests much of the water originated in...
Water (chemical formula: H2O) is a transparent fluid which forms the world's streams, lakes, oceans and rain, and is the major constituent of the fluids of organisms. As a chemical compound, a water molecule contains one oxygen and two hydrogen atoms that are connected by covalent bonds.
Water present in the oceans and seas evaporates due to the sun’s heat and gets converted into water vapour. Ice caps and snow can directly sublimate into water vapour. The atmosphere has lower temperatures in some parts of the world which causes water vapour to condense into tiny droplets.