The cell theory explains that all living beings are made up of one or more

The germ theory of disease explains that diseases result from tiny microorganisms, including viruses, bacteria

From birds flying to cars moving on the road, numerous things in our surroundings are

A food chain explains the arrangement in which living things consume other living things as

There are different sources of energy such as solar energy, wind energy, petroleum and coal.

The atomic theory explains that everything is made of tiny particles called atoms.

Scientists believe that the universe originated from a tiny point that suddenly expanded. They call

The theory of plate tectonics explains that the Earth’s lithosphere comprises enormous tectonic plates.

Gravity is a force that draws things towards each other. It is an invisible force

The theory of evolution explains how living organisms change certain features to adjust to their