Rain is one of most important natural process for our life. It makes people feel comfortable. How does rain form? Let me introduce for you. Rain is a drop of water falling from the clouds, when the sun is shining and the air is war...
Rain comes from clouds and clouds are formed by water vapor rising in the air. These water molecules will clump together and eventuallyform a cloud you can see.These water droplets will attract more water droplets and the cloud will get heavier and heavier. Like a cloud, the sponge will eve...
Rain always comes from clouds. But where do clouds come from? How does water get into the sky?Think about your bathroom. There is hot water in your bath. Steam (蒸汽) goes up from the hot water. The steam makes small clouds in the bathroom. These warm clouds meet the cold walls and...
The sun shines the water and make it hot.The warm,wet air rises up into the sky.If the warm,wet air meets the cold air,rain clouds form.When the clouds have enough water,the drops fall to the ground as rain.(1)What do we need to do this experiment? ___①a big...
Rain always comes from clouds. But where do clouds come from? How does it go into the sky?Think about your bathroom. There is hot water in your bath. Steam (蒸汽) goes from the hot water. The steam makes small clouds in the bathroom. These warm clouds meet the cold walls and windows...
Rain always comes from clouds. But where do clouds come from? How does all that water get into the sky?Think about your bathroom. There is hot water in your bath. Steam goes up from the hot water. The steam makes small clouds in the bathroom. These warm clouds meet the cold walls an...
Ask students if they know what clouds are made of? Explain that clouds are made up of millions of tiny water droplets. Tell students that you are going to do a simple experiment to teach them how clouds form. Later, you will introduce them to the main types of clouds they might see in...
When the warm air rises from the Earth and meets the cold air, a lot of droplets (小水滴) form.可知答案。 4.根据第三段的The rain runs into the Earth's seas, rivers and lakes. Then the cycle starts all over again!可知答案。 【答案】 1.D;2.C;3.D;4.C....
To understand how clouds form, we need to take a step back and examine the processes ofevaporationandcondensation. Picture a birdbath outside on a hot day. When the temperature of the environment is warm, molecules ofwater(H2O) are energetic and can move more, expanding the distances between...
"可知,水滴是从温暖潮湿的空气中产 生的。 故选B。 4.C 单词还原题。 根据第三段中“If the warm, wet air meets the cold air, rain clouds form. "可知,整个过程中 有云形成,图中缺少 cloud。 故选 C。 5.D 跨学科知识题。 根据第一段中“Do a science experiment to see how rain forms."并...