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dubmarine
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the universe is full of water but where is it made and how ?
Water can be formed when hydrogen in combusted in air / oxygen.dubmarine said:thanks Lurch, i have heard that our water comes from comets but was not sure , of course this leads to the obvious question where do comets get there water from ? hydrogen is plentifull but what about oxygen and where and how are they put together to form water ?
The same question would apply to every other element on earth. I think it makes more sense if you look at it from the other direction: Where did all the hydrogen go? It was blown away by the sun, leaving proportions that we now have.LURCH said:I think the real poser here is where the Oxygen came from. Hydrogen was abundant, on that we are all agreed. It is also well-known that hydrogen will combine with O2 without much provocation. But where did we get the O2? Stellar fusion? And if so, would it have been from the sun, or would it need to be previously made in other stars, to make it available early enough and in sufficient quantities to explain current conditions (that last bit seems very probable)?
LURCH said:The main theory seems to be that the water was present, as water, in the cloud of material from which the system formed. This is taken as one of the evidences that ours is not a first generation star, but is mostly made of debris from previous stars. We've still got mostly Hydrogen, but there are more of the heavier ellements than would be expected from space.
The majority of the water on Earth is believed to have come from comets and asteroids that collided with the planet during its early formation. These objects contained large amounts of ice that melted upon impact and contributed to the formation of oceans and other bodies of water.
The water cycle, also known as the hydrologic cycle, is responsible for the movement of water between the oceans and the atmosphere. Through a process known as evaporation, the sun's heat causes water to turn into vapor and rise into the atmosphere. As the vapor cools, it condenses into tiny droplets that form clouds. Eventually, these droplets fall back to Earth as precipitation, replenishing the oceans and other bodies of water.
No, some water does leave Earth in the form of water vapor. This occurs through a process called transpiration, where plants release water vapor into the atmosphere through their leaves. Additionally, water can also escape Earth's atmosphere through a process known as atmospheric escape. However, the amount of water that leaves Earth is relatively small compared to the amount that is constantly replenished through the water cycle.
No, not all water on Earth is safe for drinking. While approximately 97% of Earth's water is found in the oceans, this water is saltwater and not suitable for human consumption. Of the remaining 3%, the majority is frozen in glaciers and polar ice caps, leaving only a small percentage of freshwater available for drinking. It is important to treat and purify this freshwater to make it safe for consumption.
While it is unlikely that we will run out of water on Earth, there are concerns about water scarcity in certain regions of the world due to factors such as population growth, climate change, and pollution. It is important for us to conserve and manage our water resources to ensure a sustainable supply for future generations.