2. Science
Science word is from a Latin word = scientia
Scientia = to know or knowledge
Science is the systemized knowledge of our physical
world and its phenomena, which is obtained through
experimentation and observation
All the knowledge in this world, which we gain
through experimentation and observation it's all
science
3. Science
To watch youtube vedio
In english - https://youtu.be/vyGJfPZ66uc
In hindi - https://youtu.be/_0dkk1KKCss