Class 10 Science Biology Notes on InvertebratesThose animals which do not have a backbone in their body are
called invertebrates. For example amoeba, paramecium, housefly, mosquito…
Classification of Elements The process of putting different elements
together into different groups or classes according to their characteristic is
known as the classification of e…
Gravitational force:
The force of attraction between any two heavenly bodies
present in this universe is called gravitational force.
Some effects of Gravitational force:
The exi…