Considered the statement "You can move parts of your body because of energy from the sun. "Described a series of energy conversions that supports this idea.

In the process of photosynthesis, plants convert light energy from sunlight to chemical potential energy e. g present in the chemical bonds of glucose molecules when glucose is synthesized from water and carbondioxide. This glucose is transported to other parts of the plant, and converted to other molecules e. g starch e. t. c and stored in fruits and vegetables. Later, humans eat fruits or vegetables from plants or eat other animals that eat plants. Hence molecules such as starch synthesized by plants are digested by humans, and broken down in the process to digestion to simpler molecules such as glucose which are then broken down in cells in the process of respiration with the release of the chemical potential energy stored in the chemical bonds of these molecules. ATP are energy carries that are produced in the process of respiration, that carry energy to muscle cells that convert this energy to mechanical energy when muscles contract resulting in movement of body parts.