Convection is of two types: natural and forced. Heated air rising is an example of natural convection. Hot air has a lower density than that of the cooler air in the atmosphere above it and therefore is buoyant; as it rises, however, it loses energy and cools.
Your best good carbs sources are from this healthy carbohydrates list: 1  Raw and lightly steamed vegetables, 2  Legumes, beans, nuts and seeds, 3  High fiber 100% whole grains,4  Raw, whole, fresh fruits, 5  Most low fat dairy.our best good carbs sources are from this healthy carbohydrates list: 1  Raw and lightly steamed vegetables, 2  Legumes, beans, nuts and seeds, 3  High fiber 100% whole grains,
Carbohydrates or âcarbsâ are an energy source in food that comes from starch, sugar and cellulose. Carbohydrates provide vitamins, minerals, antioxidants and fiber in the diet. The current recommendations suggest 45 to 65 percent of daily calories come from these types of foods.ou can find healthful carbohydrate sources in foods like wheat, corn, rice, oats, barley, quinoa, sorghum, spelt, rye and in fruits, vegetables and legumes. Read on to learn more about the importance of including the right type of carbohydrates in your diet.