Popular science manuscript picture 1 popular science manuscript picture 2
Popular science handwritten newspaper picture 3 popular science knowledge 1, why do you see lightning first and then hear thunder? Light waves travel faster in air than sound speed.
2. Who was the first Olympic champion in China? (Xu Haifeng)
3. Whose title is the following? (Poet Fairy-Li Bai, Poet Sage-Du Fu, Shi Gui-Li He Landscape Poet-Meng Haoran, Pastoral Poet-Tao Yuanming)
4. What does the moon revolve around? How long is a cycle? (Earth) (24 hours)
5. What is the smallest and coldest star? (Pluto)
6. What is the thickness of the earth? (atmosphere)
7. Why do you want to install a black box on the plane? It is used to record all kinds of situations on the plane when the accident happened and help people understand the cause of the accident.
8. What are the customs during the Spring Festival? (Sweep the house, set off explosions, post Spring Festival couplets, eat New Year's Eve, etc. )
9. What animals can predict earthquakes? Cattle, horses, donkeys, rabbits, chickens, dogs, snakes, rats, dogs, cats, swallows, eagles, etc. )
10 which plant blooms first and then leaves? (Forsythia suspensa, Winter jasmine, Chimonanthus praecox, peach tree, pear tree)
1 1. Why is the medicine bottle so light? Because light color can reflect light, dark color absorbs more light in the sun, and drugs are easy to deteriorate. )