Question

When the world was made, how was water formed?

Answer 1

Earth is that the third planet from the Sun and the only astronomical object known to harbor life. About 29% of the surface is land consisting of continents and islands. The remaining 71% is roofed with water, mostly by oceans but also by lakes, rivers, and other water, which together constitute the hydrosphere.

Complete answer:
Earth is rich in water, and has been for a couple of billion years, but scientists are still debating just where all that life-sustaining liquid came from. a minimum of a number of it had been thought to have been brought here by comets or asteroids, but that concept still falls short in explaining how such a lot of water ended abreast of Earth’s surface – and deep below, as well.
Now, a team of scientists at Arizona State University (ASU), led by Peter Buseck, has come up with a replacement proposal. The new peer-reviewed paper was published within the Journal of Geophysical Research: Planets on October 9, 2018.
The new research suggests that Earth’s water came from both rocky material, like asteroids, and from the vast cloud of dust and gas remaining after the sun’s formation, called the solar nebula.

Note:
Earth’s ocean water is analogous thereto found in asteroids. That’s one reason scientists have long thought that the majority earthly water came from an asteroid bombardment within the days of the first system. The ratio of deuterium – a heavier hydrogen isotope – to normal hydrogen may be a unique chemical signature in various water sources.