We are the part of universe. Our earth is in solar-system and our solar system is in a galaxy. There are many galaxies in the universe. All that exists is in the universe. The universe is endless. The universe cannot be created or destroyed. The universe is made up of matter and energy.
There are different types of energy, shown as above. Matter in
the universe is available in solid, liquid and gases states. It is not possible to create or destroy total of matter and energy that exists in the universe. We can change matter and energy from one form to another.
After going this lesson you will be able to:
- explain the law of conservation of mass and energy
- calculate efficiency of some of the daily applications