Even though you can't see the wind, you can feel its mechanical energy. The sun heats up the earth's atmosphere and makes wind.
Wind is a movement of air, and air is invisible.
We can feel the wind on our cheek or see the leaves blowing in the wind. Wind can be a strong force of moving energy during different weather conditions or it can be used to make electricity. Wind socks are used at airfields to determine the direction of the wind for flying machines. Decorate with colorful patterns. Roll paper into a cylinder and tape closed.