huǒ火jiàn箭wèi为shén什me么néng能chōng冲xiàng向tài太kōng空？zhè这quán全kào靠yī一gè个shén神qí奇de的kē科xué学mó魔fǎ法——“fǎn反zuò作yòng用lì力”。zhè这jiù就hǎo好bǐ比wǒ我men们xiǎo小péng朋yǒu友zài在yóu游yǒng泳de的shí时hòu候，shuāng双shǒu手shǐ使jìn劲xiàng向hòu后huà划shuǐ水，wǒ我men们de的shēn身tǐ体jiù就huì会kuài快lè乐dì地xiàng向qián前yóu游dòng动；yòu又hǎo好bǐ比nǐ你bǎ把yī一gè个qì气qiú球chuī吹dé得gǔ鼓gǔ鼓de的，rán然hòu后tū突rán然sōng松kāi开shǒu手，qì气tǐ体fēng疯kuáng狂xiàng向xià下pēn喷chū出，qì气qiú球jiù就huì会sōu嗖dì地yī一xià下wǎng往shàng上fēi飞。huǒ火jiàn箭nèi内bù部de的chāo超jí级fā发dòng动jī机jiù就shì是xiàng向xià下gāo高sù速pēn喷chū出jù巨dà大、gǔn滚gǔn滚de的rè热qì气tǐ体，qì气tǐ体měng猛liè烈tuī推xiàng向dì地miàn面，dì地miàn面de的fǎn反zuò作yòng用lì力jiù就tuī推zhe着huǒ火jiàn箭fēng疯kuáng狂xiàng向shàng上chōng冲！gōng工chéng程shī师shū叔shū叔měi每tiān天dōu都yào要zuò坐zài在diàn电nǎo脑qián前jīng精què确jì计suàn算，bǎo保zhèng证yǒu有zú足gòu够jù巨dà大de的tuī推lì力，cái才néng能bǎ把chén沉diān甸diān甸de的wèi卫xīng星wěn稳wěn稳sòng送dào到zhèng正què确de的guǐ轨dào道shàng上qù去。

Why can rockets zoom into space? It all relies on a magical scientific wonder called 'reaction force' (or action and reaction). This is just like when we swim: our hands push the water backward with force, and our bodies happily move forward. Or like blowing up a balloon and suddenly letting go—as the air shoots downward frantically, the balloon fly upward! The super engines inside a rocket blast hot gases downward at high speeds. These gases push hard against the ground, and the ground's reaction force drives the rocket rushing upward! Engineers sit at their computers every day to calculate precisely, ensuring there's enough massive thrust to deliver heavy satellites safely onto their proper orbits.

👧 Compare With You

你抬头看天空的方式，和今天学的太空知识有什么联系？ How does looking at the sky connect to today's space fact?

📚 Vocabulary

💬 Learn Sentences

🎯 Fun Challenge

火箭靠什么科学原理飞向太空？

What scientific principle helps a rocket fly into space?

💡 想一想刚才读到的内容。 Think about what you just read.