Knowing 5 of these 8 scientific cold knowledge is a scientific expert.

The world is so big that there are many wonders in it. People have a deep understanding of never-ending science, constantly learning things around them. For example, penguins are found not only in Antarctica, but also on equator; for example, world has fireballs and colorful snowflakes falling to ground all over world. All this will probably change your understanding of science, and then we will test our scientific abilities.

1. The strongest muscle in human body

The tongue is toughest muscle in human body. The tongue is a combination of 8 different muscles. They intertwine with each other, forming a flexible cavity. In a sense, human tongue is very close to nose of an elephant. In addition, we all know that muscles need to be exercised and there are many opportunities for you to use your tongue every day.

2. Gender of crocodile

Like a normal human, their gender was determined from birth, and same is true for most creatures in nature, but eggs of reptiles such as crocodiles and alligators will develop into different types at different temperatures. When the temperature is below 30 degrees Celsius it develops into a female body, at a temperature above 34 degrees Celsius it develops into a male body. temperature change.

3. TV sound and picture

When you turn on TV, do you hear sound first or see picture? In fact, you should hear sound first. The sound and image of TV arrive at same time as radio waves, but image will appear on screen with a delay of a few seconds because kinescope takes a few seconds to warm up and start working properly.

4. The speed and slowness of quartz watches

Quartz clocks do not run at a constant speed. Generally speaking, they slow down in autumn and accelerate in spring. This is due to fact that speed of rotation of Earth is uneven. Scientists suspect that this is distribution of glaciers over two poles on earth and ocean currents. "Tricked" with rotation of Earth. Quartz clocks are still very good instruments for measuring time, and well-made quartz clocks will not exceed 1 second for 30,000 years.

5. Sneezing

No one can sneeze with their eyes open, and don't try to do it intentionally, because it can damage eyes or even pop out eyeballs. When sneezing, facial muscles of human body effectively relax, and there will be a lot of pressure inside lungs, inside mouth and inside nasal cavity. This pressure can cause jet air flow to reach a speed of 160 km/h. sneezing can damage optic nerve.

6. Flowers first, then leaves

Plants such as chickweed and peach tree first bloom and then grow leaves. I must say that this is truly a magical growth cycle.

7. About Earth

Each year, about 5 million earthquakes occur on Earth, 260-720 billion meteorites fall on earth annually, 600-800 million cubic meters of volcanic ash erupt annually, and 500,000-550,000 cubic meters of precipitation fall on earth. land every year; 350,000 lightning strikes.

8. Lighter and matches

Like it or not, but lighters have a higher technological content than matches, but in fact, lighters appeared two centuries earlier than matches. /p>

After reading 8 science tips above, do you have a better understanding of yourself? What other scientific advice do you know? Tell us about them in comment area below so everyone can expand their knowledge together.