If plants divide the water molecule, where are the water molecules re-created?



As I understand, plants during divide the water molecule during the photosynthesis. If so, water molecules have to be created again somewhere in nature, where?

In: Biology

When material is burned or metabolized (burned for cellular energy), water is formed as a result. A simple form of natural gas, methane CH4, can be burned with oxygen to form CO2 and H2O: carbon dioxide and water.

Glucose is similarly broken down in our cells, although more slowly. We sweat, pee, and exhale water out all the time. This goes back into the environment and completes the water cycle as rain.

The water is recreated when the products of photosynthesis are oxidized. Photosynthesis takes CO2, H2O, & energy and combines them to make glucose (C6H12O6) & O2. *Aerobic respiration* is essentially the same reaction, but in reverse—you start with glucose and O2, and wind up with CO2, H2O, & energy.

They consume water and CO2 to make sugar. This stores energy in the bonds and releases O2 as waste. When we consume sugar with O2 we reverse this reaction.

The water(H2O) plants intake is broken, leaving Hydrogen(H) and two Oxygen(O). The Oxygen(o2) is released, the Hydrogen(h) is combined with co2 in the plants photosynthesis cycle to be turned to sugars and used by the plant as food. Some of the water the plant sucks up from the soil is just evaporated back into the air going back to the water cycle as water vapor.

The vast bulk of the water on Earth is held in a closed system that prevents the planet from gradually drying out, but our atmosphere does have a lot of o2 which reacts with Hydrogen to create new water molecules too

Animals (the cells that make up our bodies) do the reverse of the photosynthesis reaction: sugar (from food / from plants eaten) + oxygen (from breathing) -> water + carbon dioxide.

Plants divide water and the pieces of the water combine with carbon dioxide to make sugar. Plants and animals use sugar as energy to live.

When plants or animals need to use sugar for energy, the sugar gets divided and its pieces basically turn back into water and carbon dioxide.

Animals can’t use carbon dioxide to make sugar the same way that plants can, so we get rid of it. It goes to our lungs and gets traded for oxygen in the air when we breathe. We use the oxygen to help make energy, and it gets turned into water.

> If so, water molecules have to be created again somewhere in nature,

No, they don’t. Splitting a water molecule doesn’t violate the principle of “matter cannot be created or destroyed” – it’s only being transformed. The water is being split into its constituent H₂ and O molecules, and they’re being used for something somewhere in the plant. Probably being recombined almost immediately with other molecules to make other chemicals.