云的种类

认识三种主要的云：积云（蓬松，预示晴天）、层云（呈扁平层状，带来阴天或毛毛雨）和卷云（高空中的纤细薄云），并理解云的形成过程：空气中的水蒸气冷却后凝结成微小水滴。

Identify the three main cloud types — cumulus (fluffy, fair weather), stratus (flat layers, overcast or drizzle), and cirrus (thin wisps, high up) — and understand that clouds form when water vapour in the air cools and condenses into tiny droplets

学习证据 / Evidence

• 说出并描述三种主要的云：积云、层云、卷云
• 解释云是水蒸气冷却并凝结后形成的
• 根据云的类型对天气做出简单预测

• Name and describe the three main cloud types: cumulus, stratus, cirrus
• Explain that clouds form when water vapour cools and condenses
• Use cloud type to make a simple prediction about the weather

评估问题 / Assessment

如果{{name}}抬头看天空，能不能分辨出云是蓬松的积云、扁平的层云，还是纤细的卷云，并且解释云是由微小水滴组成的吗？

If {{name}} looked up at the sky, could they identify whether the clouds are fluffy cumulus, flat stratus, or wispy cirrus, and explain that clouds are made of tiny water droplets?