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,
Sucrose, which is white table sugar, is generally an unnecessary type of simple carbohydrate in your diet. Foods high in sucrose have few nutrients and are high in calories. Good simple carbohydrates include fructose and lactose.These good simple carbs come from whole foods that provide high amounts of vitamins and minerals. Complex carbohydrates are starches that take a while to metabolize in your digestive tract.oods with Good Carbs. Nearly all foods -- with the exception of eggs, meat and some seafood -- provide carbohydrates. Milk and fruit have good simple carbohydrates, in the form of lactose and fructose.