Sunset observation sequence

1. Observe the color and brightness changes of the sun: when the sun rises from the horizon, the color of the sun is orange-red. As the sun rises, the color will gradually turn yellow and then white until the sun completely sets and the sky returns to darkness.

2. Observe the changes of the surrounding environment: When the sun goes down, the surrounding environment will change obviously due to the irradiation of the sun's rays. For example, buildings, trees, mountains and so on will form shadows in the sun, forming a variety of beautiful scenery.

3. Pay attention to the passage of time: When the sun goes down, observers need to pay attention to the passage of time.