homeschoolisfun

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#8 - Mysterious magnets 神秘的磁铁

1.Without magnets there would be no electric motors, computers or loud speakers. Magnetism is an invisible force to do with atoms - tiny particles that make up ...

#7 - The power of lasers 激光的力量

1.Laser light is a special kind of light. Like ordinary light, it is made of waves, but it has three main differences. Ordinary white light is a mixture of colo...

#6 - Look out - light's about!

https://steemitimages.com/DQmXf22yu2LoPRdAcfDtKrKry3cUfMTKgs8PzJP8bx25T8g/image.png 1.Almost everything you do depends on light and the science of light, which ...

#22 - Twisting tornadoes 扭转龙卷风

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...

#21 - Extreme snow and ice 极端的雪和冰

https://steemitimages.com/DQmS3HiDxrheHMcvk1nevS1hngKLXeHLsv7KohwQo2rJDhw/image.png 1.An ice storm isn't stormy - but it is dangerous. Cold rain falls onto free...

#20 - Hammered by hail 用冰雹敲打

https://steemitimages.com/DQmX3twMtykbDxswPmYnZu8inmQVy2SkkUyqCt2y26hw7VE/image.png 1.Hail doesn't happen often - but it can be one of the scariest kinds of wea...

#19 - Lightning strikes 雷击

https://steemitimages.com/DQmQy9LbyN2gXPW1vhtZnqqnPCKRavkw2HyngebjB3GcDxC/image.png 1.Lightning is a giant spark of electricity. It happens when tiny droplets o...

#18 - Raining cats and dogs 下着倾盆大雨

1.It may seem like bad weather, but we need rain. Rain happens because the Sun's heat makes water in the sea evaporate. It turns into a gas and rises into the a...

#17 - Amazing Oceans 惊人的海洋

The oceans cover about 361 million square kilometers and they are all connected. The average depth of the ocean is 3750 meters. Over 90 percent of the Earth's s...

#16 - Glaciers and Icebergs 冰川和冰山

1.About two percent of the water in the world is permanently frozen as ice. The ice is found at the chilly polar regions, and on high mountains where the air is...

#15 - The ends of the Earth 地球的尽头

1.The Earth is round, but it has two 'ends' - the North Pole and the South Pole. The Earth is constantly spinning around an imaginary line called the axis. At t...

#14 - Dry Deserts 干沙漠

1.Deserts occur in places where it's hard for rain to reach. Most rain comes from clouds that form over the sea and blow onto the land. If there's a big mountai...

#13 - Terrifying tsunamis 可怕的海啸

1.A tsunami is a giant wave or series of waves. Tsunamis form when a large amount of water in a sea or lake is moved suddenly. This sets up a circular wave, a b...

#12 - Extreme earthquakes 极端地震

1.An earthquake happens when the Earth's crust moves suddenly. The crust trembles, cracks, or lurches up and down. Earthquakes can be disastrous. They make hous...

#11 - Going underground 去地下

1.Humans have climbed the world's highest mountains - but many underground caves are unexplored. Caves are usually formed by water flowing through cracks underg...

#10 - Record-breaking lakes 破纪录的湖泊

1.The Caspian Sea in central Asia is actually the world's biggest lake! It covers 378,000 square kilometers. It isn't connected to true seas and oceans, but bec...

#9 - Rivers and waterfalls 河流和瀑布

1.The Earth is laced with thousands of rivers. Rivers are channels of water that flow towards the sea. They allow the rain that falls on the land to drain away....

#8 - Hot springs and fountains 温泉和喷泉

1.There are natural hot baths and showers all over the world. You might think water outdoors is cold, but in some places, water meets hot rock under the ground ...

#7 - Violent Volcanos 暴力火山

1.A volcano is a place where hot, liquid rock (magma) bursts out of the Earth. At the Earth's surface, magma is called lava. Red-hot lava can be seen flowing or...