Water
Water is that the solely substance on Earth that’s unremarkably found all told 3 states of matter, as solid ice, liquid water, and aerosolized water vapour. A water molecule is straightforward, with 2 atoms of hydrogen and one in every of oxygen. However it’s maybe the foremost vital substance on Earth. Most of our planet’s surface is roofed with water and it makes up sixty percent of our own bodies.

WATER TO DRINK
Water while not dirt or germs is important permanently health. To create it clean, dirty water is tried and true a series of filters. These take away smaller and smaller things, from floating twigs and leaves, to bits of sand and grit, and at last a number of the little germs. Adding chemicals like element then kills any remaining germs.

ICE FLOATS
Cooled right down to 39.2°F (4°C), water gets smaller or contracts, and then it’s heavier (more dense). Below 39.2°F (4°C), it starts to induce larger or expand. Therefore once it freezes as ice at 32°F (0°C), it’s lighter than the liquid water around it—and floats.

DRYING UP
Water desires heat to “dry”- that’s, flip from liquid into gas. This can be why puddles dry up quicker on hot, sunny days. Our sweat is generally water. It dries by drawing heat from the body.



CLOUDS AND water vapour
The gas kind of water, called water vapour, is invisible. It will frame the maximum amount as 0.04 % . we are able to see it once this vapor cools and turns back to little droplets of liquid water, therefore tiny and light-weight that they float-what we tend to decision clouds

PLANET WATER
Only tierce of planet Earth is roofed with land, rocks, and soil. The remainder is water. Almost 97.5 % of this can be salty water, in seas and oceans. But a pair of 5 % is water in rivers, lakes, soil, and rocks and fewer than 0.01 % of this water is well offered to use, in lakes and rivers.

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