What are clouds ?

The Borneo Post - Good English - - News -

A CLOUD is made of water drops or ice crys­tals float­ing in the sky. There are many kinds of clouds. Clouds are an im­por­tant part of Earth’s weather.

How do clouds form?

The sky can be full of water. But most of the time you can’t see the water. The drops of water are too small to see. They have turned into a gas called water vapour.

As the water vapour goes higher in the sky, the air gets cooler. The cooler air causes the water droplets to start to stick to things like bits of dust, ice or sea salt. What are some types of clouds?

Clouds get their names in two ways. One way is by where they are found in the sky. Some clouds are high up in the sky. Low clouds form closer to Earth’s sur­face. In fact, low clouds can even touch the ground. These clouds are called fog. Mid­dle clouds are found be­tween low and high clouds.

An­other way clouds are named is by their shape. Cir­rus clouds are high clouds. They look like feath­ers. Cu­mu­lus clouds are mid­dle clouds. These clouds look like gi­ant cot­ton balls in the sky. Stra­tus clouds are low clouds. They cover the sky like bed sheets.

What causes rain?

Most of the water in clouds is in very small droplets. The droplets are so light they float in the air. Some­times those droplets join with other droplets. Then they turn into larger drops. When that hap­pens, grav­ity causes them to fall to Earth. We call the fall­ing water drops “rain.” When the air is colder, the water may form snowflakes in­stead. Freez­ing rain, sleet or even hail can fall from clouds. Why does NASA study clouds?

Clouds are im­por­tant for many rea­sons. Rain and snow are two of those rea­sons.

At night, clouds re­flect heat and keep the ground warmer.

Dur­ing the day, clouds make shade that can keep us cooler.

Study­ing clouds helps NASA bet­ter un­der­stand Earth’s weather.

NASA uses satel­lites in space to study clouds. NASA also stud­ies clouds on other plan­ets.

Mars has clouds that are like the clouds on Earth. But other plan­ets have clouds that aren’t made of water. For ex­am­ple, Jupiter has clouds made of a gas called am­mo­nia.

1. What do drops of water turn into?

A vapours B clouds C fog

2. What are two ways clouds get their names?

3. What kind of clouds are high clouds?

A mid­dle clouds B cir­rus clouds C cu­mu­lus clouds

4. What clouds look like gi­ant cot­ton balls?

A stra­tus clouds B cu­mu­lous clouds C cir­rus clouds

5. What causes droplets of water to fall to Earth?

A larger drops B heat C grav­ity

6. What does NASA use to study clouds?

A tele­scopes B space sta­tion C satel­lites

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