Thunder and lightning are not different they are same its produced by the because of the same incident.We are seeing lighting first because light travels much faster than sound,that's why after some time we are hearing thunder sound.
Lets see how thunder and lightning are formed in the sky,when moisture level is increased in the cloud,they bump into each other then move around in the air.All of those collisions create an electric charge.charge. Positive charged particles in the top of the cloud and negative charged particles in the bottom of the cloud.Bumping of this molecules created a lot of electricity and this creates a sound as well.Since opposites attract each other,negative charges are attracted to the positive charged earth,that's why lightening is coming down to earth.
Lets see how thunder and lightning are formed in the sky,when moisture level is increased in the cloud,they bump into each other then move around in the air.All of those collisions create an electric charge.charge. Positive charged particles in the top of the cloud and negative charged particles in the bottom of the cloud.Bumping of this molecules created a lot of electricity and this creates a sound as well.Since opposites attract each other,negative charges are attracted to the positive charged earth,that's why lightening is coming down to earth.