Today is the 55th Earth Day
Protecting the planet we live on
It is everyone's responsibility
These trivia facts about the planet
Do you know
Let's find out
The origin of Earth Day
The World Earth Day (The World Earth Day) is celebrated on April 22 every year, which is a holiday dedicated to the protection of the world's environment, aiming to raise public awareness of existing environmental problems and mobilize people to participate in the environmental protection movement, and improve the overall environment of the earth through green and low-carbon living.
10 trivia facts about the planet
1
The English word "Earth" originates from the Anglo-Saxon (Old English) word "Erda", which means "ground" and "soil". Despite its name, 71% of the Earth's surface is covered by water.
2
The mass of the Earth is 5.975×1024 kg. To this day, it continues to accrete material such as comets, meteorites, cosmic dust and interstellar molecules in space. According to expert estimates, the Earth receives about 100,000 tons of interstellar matter every year, of which 23,430 tons of cosmic dust alone. So, the earth is getting a little bit fatter every year.
3
Since the Earth emerged from chaos 4.6 billion years ago, more than 1 trillion species of organisms have lived and thrived on it. How many living creatures are there on the earth now? Go to the small garden at the door and dig a spoonful of soil with a spoon, and there are more "living" organic life in it than there are human beings on the earth.
4
About 620 million years ago, the day on Earth was only 21.9 hours. It can be seen that the rotation speed of the earth is gradually slowing down, but the magnitude is negligible for us - only 70 milliseconds every 100 years, so if we want the earth to have one hour more day, we will have to wait another 100 million years.
5
Historically, there have been many magnetic pole reversals on Earth, from north to south and south to north, the most recent being 780,000 years ago. Some scientists suspect that the reversal of the Earth's magnetic poles was the cause of the extinction of ancient organisms.
6
Our Earth is able to survive in the universe thanks to Jupiter. Jupiter is large, massive, fast in rotation, and gravitational more than ordinary planets, and meteorites that originally flew to the earth were attracted by Jupiter and crashed into it one after another.
7
Earth is currently the only planet known to have plate tectonics. Seven massive plates are moving in different directions, shaping the planet's kaleidoscopic geological features. Don't look at the movement of 1 centimeter to 10 centimeters per year, the global carbon cycle depends on these few centimeters per year to prevent the earth from overheating.
8
Human exploration of space has never stopped since ancient times, but with the launch of artificial satellites and space stations, there is more and more space junk. In 2014, a NASA data report said there were 2,600 failed but orbiting satellites floating above the Earth, twice as many as the number of active satellites. According to the statistics of the US space monitoring network, there are 26,000 objects in orbit above 10 centimeters, and more than 50,000 objects between 1 centimeter and 10 centimeters, most of which are space junk.
9
Water on Earth is widely distributed. It is distributed in the ocean, land and atmosphere in solid, liquid and gaseous forms, forming various water bodies, which together form the hydrosphere. Among them, the ocean is the main body of the hydrosphere, covering an area of about 361 million square kilometers, covering about 71% of the earth's surface. Land water includes surface water (such as river water, lake water, swamp water, etc.) and groundwater. The proportion of living water and atmospheric water is very small. In the "big tank" that the earth provides for humans, there is actually only one tablespoon of water that can be drunk. The vast majority of the earth's water is saltwater, accounting for about 97.2%, and freshwater accounts for only about 2.8% of the world's total water, of which about 77% is ice and snow in polar ice sheets, mountain glaciers and permafrost that are difficult for humans to use. What humans can really use is rivers, lakes and some of the groundwater.
10
About 300 million years ago, almost all of the Earth's land was a single whole. During the Jurassic period, Panpalea split into two continents, which over time split into what they are now.
How to care for the planet?
Garbage sorting is important
When we throw away garbage, we should pay attention to the classification, and send the reusable ones to the recyclable garbage cans, and the toxic ones to the "hazardous garbage", so that the animals cannot eat them. Do a good job of garbage classification, save resources, and do not let garbage pollute the environment.
Protection of animals and plants
To protect animals, stay away, but don't harm them.
Plant more trees to protect flowers and plants.
Save water and electricity
We should remember to turn off the lights before we go out, before going to bed, and remember to turn off the power when we are not using electrical appliances.
When washing your hands, turn off the faucet in time, and drink as much water as you want, so as not to waste it.
Low-carbon mobility
When the weather is fine, we can also go outdoors for cycling, walking, etc., which not only exercises the body, relaxes the body and mind, but also reduces energy consumption.
Be an environmental advocacy champion
Remember to teach these environmental protection knowledge to your family, remind your family to sort garbage, remind your family to turn off the lights when you go out, and call on everyone to "CD" together when you eat......
Let more people take care of the earth together, so that the earth can feel and the environment will become better and better!
Synthesized from China Education News, "You Know and Don't Know Water"