Blow wind, blow
What is wind? You can never see it, but you can enjoy it, feel it tousle your hair and sweep up things in its wake. In terms of mechanical energy, it is a power source and can generate electricity with windmills. It can make hot air balloons fly. In the old days, sailors used wind power to sail ships. But, when winds are strong, they can be destructive – causing forest fires, landslides, loss of property and life, storms, cyclones and more.
Wind blowing above the earth surface may be classified into five major types. Use these dialog cards and learn about the different kinds of winds.