We all know the Sun is important. 【小题1】 But how does the Sun do that? It's the Sun's energy that makes life live on our planet. Energy from the Sun is called solar energy.【小题2】People started to use solar energy many years ago. They build houses with windows so that the sunlight can get inside and make them warm.

【小题3】 It has something to do with solar panels(太阳能电池板). Solar panels collect energy from sunlight to make electricity(电).

But what happens when it is cloudy or rainy? Solar panels cannot collect energy from sunlight on cloudy and rainy days. We needn't worry about it because solar panels have batteries (电池) in them to keep electricity. 【小题4】

The Sun makes more energy than people use now. At the same time, solar energy is good for the environment(环境).【小题5】And we can’t use it up. So we should try our best to find more good ways to use it in our life.