Band 9: The diagrams show the structure of the solar panel and its use. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

The diagrams illustrate the internal structure of a solar panel and explain how it functions to heat both air and water.

Overall, the process relies on a box with a transparent top to trap solar energy. While the basic design remains the same, the internal components are slightly modified depending on whether the panel is used to heat air or water.

The solar panel consists of a container (box) with an inlet and an outlet, covered by a transparent glass top to let sun rays in. In the air-heating domestic tool, cool air enters through the inlet on the left. As sun rays strike the panel, the heat energy is absorbed, warming the air inside. This heated air then flows out through the outlet on the right to be used.

For heating water, the mechanism is similar but involves a water pipe placed inside the box. Cool water flows through this pipe, which is heated by the solar energy trapped within the container. The resulting warm water then exits through the outlet. Unlike the air-heating system which warms the air directly in the box, the water system uses a pipe to heat the liquid before it is discharged.