The term convection generally refers to the movement of fluids, meaning liquids and gases, but in the earth sciences, convection also can be used to describe processes that occur in the solid earth. This geologic convection, as it is known, drives the plate movement that is one of the key aspects of plate tectonics.
The recommended range is 45 â 65% of calories as carbohydrate. For example, if you eat 1600 calories per day, and 50% of those calories are carbohydrate, you would eat 200 grams per day. Athletes need to eat at the high end of the carbohydrate range, to fuel training and competition.
One cup of raw beets has 58 calories and 13 grams of carbohydrates. A cup of beet juice is usually around 100 calories and 25 grams of carbohydrates, because of the way it is processed. Beets are good sources of folate, potassium, vitamin C, fiber, and antioxidants, as well as nitrates. Other good food sources of nitrates include spinach, radishes, lettuce, celery, and Chinese cabbage.