My structure is not complicated, it is a colorless, odorless and transparent substance. Even so,

But I am an indispensable element in people's lives. Fire, air and soil are my brothers. I am boiling at 100℃.

It freezes below zero.

My mass and volume are very small. The mass of a water molecule is about 3 x 10 *-26 kg.

There are about 1.67 x 10*23 water molecules in each drop of water. I am so young, when?

However, you humans can't see me with the naked eye. If10 billion people are used to count the water molecules in a drop of water, everyone

Every minute is counting 100, day and night, for more than 30 thousand years.

I want you to guess when.

When our molecules gather together to form water, will there be a gap between them?

you

Children can't see me at ordinary times, because my brothers and sisters and I get together to form the water you usually use. My brothers and I always run around in the water, especially when the temperature is high in summer.

Children run faster, so our kinetic energy increases a lot. Of course, when we run, there is a regular distance, because there is a great attraction and repulsion between us, which produces the so-called potential energy. We are here every day.

Doing this kind of movement also produces the internal energy of the object. Many other molecules are like us. For example, molecules in gasoline have a bad temper. When they keep running around, their internal energy gets bigger, and finally they will burn for supply.

Humans keep warm. It seems that our molecules have made great contributions. Let's start with our water molecules. We have the ability to eat a lot of heat every time we raise 1℃, and the specific heat capacity marks the size of this energy. Sometimes when we get to the seaside,

The reason why people feel cold is because our water has a large specific heat capacity and we eat a lot of calories, but our stomachs are not full, so the temperature will not rise quickly. My brother's gasoline is often put in a machine called a gasoline engine, which is rather annoying.

Molecules often get angry under the stimulation of sparks, generating a lot of internal energy to push the crankshaft and gears below at once, so that you can see that the automobile tires are constantly turning. What about our micro-molecular world?

Isn't the world great? We will work harder and create more success.