The answer is that the riddle of rain is simple.

The answer is that the riddle of rain is very simple, as follows:

1, problem: score (type 1):

Answer: It rains.

2, puzzle: thousands of lines, ten thousand lines, falling into the water can not be seen. (Hit a natural object)

Answer: It rains.

3. Puzzle: The sun sent me to the sky, and Fengbo sent me to all directions. Only when I shed tears can I return to my hometown. (Hit a natural object)

Answer: It rains.

Rain:

Rain is a natural precipitation phenomenon, which is caused by the disturbance of atmospheric circulation. It is an indispensable part of the earth's water cycle and the only way for almost all terrestrial plants far away from rivers to replenish fresh water.

Rain usually appears in four forms: frontal rain, convective rain, topographic precipitation and typhoon rain. Its main component is water, with a small amount of sulfur dioxide and nitrogen dioxide. Usually, the PH value of rain is around 5.6, and rain with a PH value less than 5.6 is acid rain.

Reasons for formation:

After the water on the earth is irradiated by sunlight, it becomes steam and is evaporated into the air. Water vapor condenses into small water droplets when it meets cold air at high altitude. These water droplets are very small, and the largest is only 0.002 mm.

They are small and light, and they are held in the air by the updraft in the air. It is these small water droplets that gather in the air to form clouds. These small water droplets will become raindrops and fall to the ground, and the volume will increase by about 1 10,000 times.

Main impacts:

Benefits:

1. Rainwater is an indispensable part of the earth, and it is also the only way for almost all terrestrial plants far away from rivers to replenish fresh water.

2. Rainwater can irrigate crops, which is beneficial to afforestation.

Rain can reduce the dust in the air and lower the temperature.

4. Rainwater is beneficial to reservoir water storage, groundwater recharge and river water replenishment, and is beneficial to power generation and shipping.

Rain can isolate the noisy world, create a quiet environment, hypnotize and wash the streets.

6. Rainwater can wash away ground garbage, dilute toxic substances and purify the environment.

7. Rain can purify the air and make you feel cheerful after rain.

Disadvantages:

1, too much rain will affect the growth of plants, inhibit their breathing, and even die.

2. Every rainy season in the middle and lower reaches of the Yangtze River in China, there will be rainy weather for a long time, at which time everything is easy to get damp and moldy.

3. When a thunderstorm comes, there will often be weather phenomena such as strong winds and thunderstorms. The wind came, flying sand and stones, overturning roofs and blowing down walls. In the storm, things in the street danced with the wind, flying everywhere and even uprooting trees.

Continuous rainy days will affect people's mood and make them feel bored and depressed.

Too much rain will lead to traffic jam and cause natural disasters such as landslides and mudslides.

6. Acid rain will erode many buildings.

7, causing the road to slip, which leads to a car accident.

8. Rainwater will bring toxic substances from soil into groundwater, thus polluting groundwater.

9. Too much rainfall will lead to the surge of water levels in reservoirs, rivers and lakes, causing floods.

10. Too much rainfall will cause serious soil erosion.