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.
Be calorie smart 400-600-600. Calories are a measure of the amount of energy in food and drinks. Knowing how many calories are in your food can help you balance the energy you put in your body with the energy you use, which is the key to maintaining a healthy weight. The calorie rule of thumb is simple! 1  Just eat around 400 kilocalories (kcal) for breakfast (including any drinks and accompaniments) 2  600kcal for lunch (including any drinks and accompaniments) and another.  600kcal for your evening meal (including any drinks and accompaniments)