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.
Typically a bovine will consume 7 to 10% of it's body weight in water per day. In contrast, is common knowledge is that a cow (typically a lactating dairy cow) will drink around 25 to 50 gallons (95 to 190 litres) of water per day. However, these numbers only account for lactating dairy cows, not all cattle in general.