Interesting Science

         The moon is one of the celestial objects which act as the natural satellite of the earth. The moon orbits the earth continuously, thereby completing its one orbit around the earth in every 27.32 days. As the moon orbits around the earth, it will seem to appear in different shapes with regarding to different positions in the sky. We may wonder, how the moon actually changes its shape in the sky at regular intervals. The science is, that the moon does not actually change its shape; it all happens due to the position of the moon with respect to the earth (i.e., us) and the sun, which we call it as a phase change. Credit (Different shapes of Moon):  By Hamed Rajabpour and Nariman Ghorbani - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=67278168       The different position of the moon around the earth also makes it to rise at different time above the horizon which makes us to appear at different shapes in the sky. A phase change is the process of the

     Lightning is a wonder of nature that occurs as a heavy flash within the same cloud or between two clouds or between the cloud and the earth. But most of them occur within the cloud. These lightning flashes are made by the thunder clouds due to the difference in the potential difference.     A thunder cloud is a type of cloud that has more number of water droplets and ice crystals in it, which are the prone elements for making lightning activities. These elements make the thunder clouds to appear in black in color, because more number of particles in it does not allow sunlight to pass through it, thus making the cloud to appear in a dark color. But the top portion of these thunder clouds will remain bright due to the reflection of sunlight. A potential difference is mainly a voltage that is developed by the various charges present in the clouds.    Charges can be classified into three types namely, positive charge, negative charge and no charge. Lightning occurs mainly due to