Of course, the solar and Earth systems are much more complex than a car or a toaster, but they can be described as systems just as well. The reason we look at Earth as a system is so that we can break it down and try to understand how each part works and how the parts are related. The reason we break down the system is because the Earth is much too complex to try to understand all at once. A dynamic system is a system that is constantly changing. The Earth is a complex dynamic system because it has numerous parts, that all are interconnected and working together, and these parts are constantly changing with time.
Earth has an extremely interesting history and Earth has an equally exciting future.
A system needs energy to run. Energy is the ability to do work. Work usually involves moving matter from one place to another, causing a chemical reaction to occur. All energy is eventually turned into heat energy. This force of attraction is dependent on the mass of the objects and the distance between them.