Small quantities of certain minerals like iron, calcium, magnesium, and salt are important for nutrition and health.

Rising into the atmosphere, the water condenses into clouds. When the clouds become too saturated with water, the water is released as snow or ice precipitation which may warm as it falls to reach Earth as rain.

Found in both animal sources (meat, fish, eggs, cheese) and vegetables (beans, nuts, some grains), proteins are important for the body's maintenance, growth, and repair.

A proton is a subatomic particle found in the nucleus of an atom. It carries a positive electric charge.

Food is mixed with gastric acid and pepsin in the stomach to help break down protein.