Chapter 3 Weather and Climate Section 1 Changing Weather

Chapter 3 Weather and Climate

Section 1 Changing Weather

Weather and its effects: Weather and climate are closely related to human activities and are a frequent topic of conversation. Weather is the atmospheric condition of a region in a short period of time, and it is changing all the time. Climate is the average condition of weather in a region over many years. The climate of a region has certain characteristics and generally does not change much.

What is the weather for tomorrow? : You can often see satellite cloud maps in weather forecasts, which are an important basis for weather analysis and weather forecasting. On a satellite cloud map, green indicates land, blue indicates ocean, and white indicates cloud areas. The thickness of clouds varies from region to region. The whiter the color of the clouds, the thicker the cloud cover. Areas with thick clouds are usually cloudy and rainy areas.

To make the weather forecast easier to read, special symbols are usually used to indicate weather conditions. On television weather forecasts, weather symbols usually appear together with the name of a city. Sometimes two weather symbols appear next to the name of a city, indicating that the weather will change from one weather condition to another. People can get weather forecasts in a variety of ways, for example, through the Internet, telephone, etc. They can check the weather forecast at any time.

We need clean air: In our daily lives, people are not only aware of the daily weather changes, but are increasingly concerned about the quality of the air each day. The quality of air is related to the amount of pollutants contained in the air, which can be expressed by the pollution index. Fresh air with a low pollution index is good for human health; dirty air with a high pollution index is bad for human health.

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