#22 - Twisting tornadoes 扭转龙卷风

homeschoolisfun (50)in #homeschool • 7 years ago (edited)

1.Tornadoes are also called twisters.
A tornado is an incredibly powerful windstorm that twists around in a swirling 'vortex' shape. It forms a narrow funnel or tube, stretching from the clouds to the ground. Tornadoes often look dark because of all the dirt, dust, and broken objects that they pick up as they travel across the land.

2.You can sometimes tell when a tornado is coming because the sky turns green.
Tornadoes usually develop from thunderclouds. Scientists are not sure exactly how they form. They think that as warm, damp air rises, drier, colder air is pulled in and begins to swirl around it. This creates a spinning tube of wind that moves along the ground. A tornado can travel at up to 80 kilometers an hour.

V A large, terrifying tornado snakes down to the ground from the base of a big thundercloud. V

3.Tornadoes contain some of the fastest winds on the planet.
Wind inside a tornado can move at up to 500 kilometers an hour. This powerful wind can cause terrible damage. Tornadoes smash buildings, tear off roofs, make bridges collapse, and suck out doors and windows. They can pick up people, animals, and cars, and carry them through the air. In 2006, a tornado in Missouri, USA picked up 19-year-old Matt Suter and carried him nearly 400 meters. He survived with only cuts and bruises.

V Tornadoes often form where a front, or mass, of cold air, meets warm air. They spin around each other and form a funnel shape. V

4.Damaging tornadoes happen most often in Tornado Alley.
This is an area which stretches across the middle of the USA, between the states of Texas and Illinois. Tornadoes are most common there in the tornado season, from April to August. The Great Tri-State Tornado of 1925 was one of the worst ever. It roared through Missouri, Illinois, and Indiana, traveling 350 kilometers. It destroyed 15,000 homes and killed 695 people.

V The yellow colored area on this map shows the part of the USA known as Tornado Alley, where tornadoes are most common. V

5.Sometimes, tornadoes occur in deserts, or over the sea.
In sandy deserts, small tornadoes pick up sand and carry it along in a whirling tower. They are called sand devils or dust devils. Tornadoes over the sea can suck up water in the same way, and carry it for long distances. They are known as waterspouts.

yey, DIY section once again!

We will be making a tornado, in your very own bottle!

You will need:
Two plastic bottles of the same size,
Water,
And some sticky tape.

First, Fill one of the bottles almost full with water.

Second, Position the second bottle upside-down on top of the first, so that their necks join together. Tape them together firmly.

Third, Turn both bottles over and swirl them around in a circle as fast as you can.

Now, When you hold them still, you should see a tornado shape as the water forms a vortex.

So unless you want to wait until you actually do it, you can see the photo at the bottom of this post!

龙卷风也称为扭曲者。
龙卷风是一个令人难以置信的强大的风暴，扭曲着漩涡的“漩涡”形状。它形成一个狭窄的漏斗或管，从云层延伸到地面。龙卷风经常看起来很黑暗，因为他们穿过这片土地时，他们拾起的所有污垢，灰尘和破碎的物体。

有时候你可以知道龙卷风来了，因为天空变绿了。
龙卷风通常由雷云发展。科学家们不清楚它们是如何形成的。他们认为，随着温暖，潮湿的空气升起，更干燥，更冷的空气被拉入，并开始在周围旋转。这产生了沿着地面移动的纺纱管。龙卷风每小时可达80公里。

V一个大而可怕的龙卷风从一个大雷云的底部蛇下到地上。 V

龙卷风包含地球上最快的风。
龙卷风内的风能每小时移动500公里。这种强风可能会造成可怕的伤害。龙卷风粉碎建筑物，撕开屋顶，使桥梁倒塌，吸出门窗。他们可以拿起人，动物和汽车，把它们带走。 2006年，美国密苏里州的一场龙卷风拾起了19岁的马特·苏特（Matt Suter），带着他近400米。他只有削减和瘀伤才幸存下来。

V龙卷风经常形成一个前面或大量的冷气遇到温暖的空气。它们彼此旋转并形成漏斗形状。 V