Chemistry is a branch of physical science that studies the composition, structure, properties and change of matter.
Daily water consumption varies quite a bit. Season of the year, workload, reproductive status, diet, and climate factor into the volume of water needed by a particular horse on a specific day. As a starting point, the average horse drinks between 5 and 10 gallons (19 and 38 liters) of water each day. The horse may need slightly less if it is grazing lush pasture because fresh grass contains a high percentage of liquid.
We had to take the handle off our faucet because out mischievous mare learned how to turn it on with her mouth. There must be a lot of thirsty horses out there...our mares only drink about 12-15 gallons a day each, even in the 100 degree heat. On the sixth day, God created the Quarter Horse. On the seventh day, he Painted the good ones.