look soft. But clouds are heavy.Clouds look soft. But clouds are heavy.  Clouds have a lot....On cloudy days, clouds are gray and thick. They are heavy.On cloudy days, clouds are gray and thick ……

Try this:Making clouds ……

. But the clouds are wetter and make quick and heavy rain showers more easily. The rain cleans the air.... Scientists now know that clouds there play a really big role.Where on Earth has the cleanest air ……

云朵其实很重哦！Most clouds might look light (轻的). But they are heavier than you think. A cumulus cloud (积云) weighs about 500,000 kg. That’s as heavy as 100 elephants. Clouds look big but are actually made ……

themselves. A cumulus cloud (积云) can be as heavy as 100 elephants!No. Some clouds might look like...  你能站在云上吗?你能站在云上吗?No. Some clouds might look like thick and fluffy balls of cotton ……

as well. These white, soft clouds absorbed (吸收) all of my worries and left me with a refreshed heart.When... exercise my body, but I also gained inner peace with the help of my favorite clouds. The sun ……

  Some clouds weigh (重) as much as 85 elephants. Some clouds weigh (重) as much as 85 elephants.    ……

Isn't thistorch(火炬) beautiful? It is the Beijing 2008 Olympics Torch. It looks like an old Chinese paperscroll(卷轴). The pictures on it are Chinese "lucky clouds."Torch factsHow long: 72cmHow heavy ……

Isn't thistorch(火炬) beautiful? It is the Beijing 2008 Olympics Torch. It looks like an old Chinese paperscroll(卷轴). The pictures on it are Chinese "lucky clouds."Torch factsHow long: 72cmHow heavy ……

Isn't thistorch(火炬) beautiful? It is the Beijing 2008 Olympics Torch. It looks like an old Chinese paperscroll(卷轴). The pictures on it are Chinese "lucky clouds."Torch factsHow long: 72cmHow heavy ……

there in the cloud.A cloud can be as heavy as 100 elephants! So why doesn’t it fall? It’s because clouds.... That’s taller than Mount Qomolangma! They bring heavy rain and storms.These clouds can grow as high ……

) weighs about 500,000 kg. That’s as heavy as 100 elephants. Clouds look big but are actually...;s as heavy as 100 elephants. Clouds look big but are actually made up of many small water droplets (小滴 ……

The clouds floating across the sky are made of tiny droplets (滴) of water. Dust is made of tiny particles (颗粒) that float in the air. Let's see how dust can help create clouds.You'll needClear soft ……

(冰晶).The ice crystals form large drops that are too heavy to stay in the clouds. Then they fall...银) into the clouds, making particles (微粒) in the clouds with the right conditions.Airplanes drop salt and silver ……

雨天的云为什么会变灰？雨天的云为什么会变灰？On sunny days, clouds are good at “bouncing off (弹开)” light. All the colors... clouds as white. But when it rains, clouds get thicker. Less light “bounces off” into your eyes. So ……