Knowledge world

Knowledge world is a library of articles, project ideas, interesting videos and interviews of all the five K-12 stakeholders , activities for Students, activities for Teachers and Parents to use with children and Project Ideas that Students can use for their project work. Use search or filters to find your desired knowledge resource.

Articles Videos Interviews Hands-On Activities Fun Activities Project Ideas

Egg experiment- boiled or not


How will you understand whether an egg is boiled or not? Let’s try this project.


  • One hardboiled egg
  • One raw egg
  • Refrigerator


  • Keep the hardboiled egg in the refrigerator so that its temperature becomes the same as that of the raw egg.
  • Spin both the eggs.
  • You will see one egg spinning, while another wobbling.
  • Now touch both the eggs lightly. You will notice one will stop and another will keep moving.


The raw egg’s wobbling motion is due to the movement of the white and yolk inside the shell. Even when you touched the raw egg, it kept moving because of inertia. This similar type of force you experience when you stop your car suddenly.

Image Credit:

Next Education