1. What is weather?
It's the condition of the atmosphere at a particular place and time.
2. What is the atmosphere made of?
It is mostly made of air.
3. What can fall from clouds when the temperature is above 0°C?
Rain.
4. How do snowflakes form?
The ice crystals fall from the cloud and stick together.
5. Why are rain and snow important for life on earth?
Because they bring water back into lakes, rivers and seas.
答案:1. It's the condition of the atmosphere at a particular place and time.
2. It is mostly made of air.
3. Rain.
4. The ice crystals fall from the cloud and stick together.
5. Because they bring water back into lakes, rivers and seas.