In general, foods are made up of carbohydrates, proteins, and fats, each of which provide a different number of calories: 1  Carbohydrates provide 4 calories per gram. 2  Proteins provide 4 calories per gram. 3  Fats provide 9 calories per gram.
IMPORTANCE OF WATER. Water is our lifeline that bathes us and feeds us. In ancient cultures water represented the very essence of life. The Romans were the first to pipe water into their growing cities, especially with their aqueducts.
Water is Important for Life. Some of the Earthâs water supply is temporarily locked up within the many lifeforms found across the Earthâs biosphere. This water makes up a majority of most organisms, and is a critical component, making the processes of life possible.