Egg Spin Test to Find Out if an Egg is Raw or Boiled


Do you know that you would be able to inform whether or not an egg is uncooked or boiled with out cracking the shell? It’s known as the egg spin check and it’s very easy and enjoyable to strive at house or within the classroom.

You’ll be able to inform if an egg is boiled or uncooked with out cracking it!

How one can Inform if An Egg is Arduous Boiled

My youngsters (and I) had been excited to study this straightforward egg experiment which got here in helpful in our house not too long ago. As we had been making ready for some critical egg adorning, we misplaced monitor of which bowls contained uncooked egg or boiled egg.

With out having to crack an egg, we used egg physics to assist us clear up our downside within the type of the egg spin check.

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Egg Spin Experiment: Uncooked vs. Boiled Egg

I did a little analysis and located a easy means to determine which of the eggs had been boiled and which of the eggs had been nonetheless uncooked with a easy spin an egg.  This beneficial egg hack can be a good way to show somewhat science lesson for the youngsters.

Egg Experiment for Kids: Raw Egg or Boiled Egg?

Provides Wanted for Egg Spin Take a look at

  • Eggs – uncooked & boiled
  • Flat floor

Egg Spin Take a look at Directions

Egg spin experiment is an egg cooked or raw - Kids Activities Blog - lines of eggs on blue background with one cracked egg
The 1st step is to put egg gently on a flat floor.

Step 1 – Discover a Take a look at Floor

Place the egg in query on a flat floor.

Step 2 – Spin an Egg

Grip it between your thumb and fingertips, after which gently spin it. Emphasize “gently” along with your youngsters, as a result of a uncooked egg spinning off the desk can get messy…I communicate from expertise!

Step 3 – Cease the Egg Spin

Whereas the egg is spinning, contact the egg calmly sufficient to make it cease spinning, after which carry your finger off.

Outcomes of Spin Take a look at: Is it a Boiled Egg? Is it a Uncooked Egg?

If the egg is difficult boiled:

If the egg is boiled, the egg will keep in place.

If the egg is uncooked:

If the egg is uncooked, it should amazingly begin spinning once more.

So what on this planet is occurring?

Egg Experiment works because of egg physics  Kids Activities Blog - egg on yellow background
Let’s look nearer at why this works!

This Egg Spin Experiment Works Due to Egg Physics!

This can be a excellent instance of inertia and Newton’s Regulation of Movement:

An object at relaxation stays at relaxation, and an object in movement stays in movement at fixed pace and in a straight line except acted on by an unbalanced power.


So, one thing in movement will keep in movement till acted upon by one other power.

1. Egg and Shell Spin Collectively When Egg is Uncooked

The egg shell and its content material are spinning alongside collectively. Once you cease the egg from spinning, you cease the egg shell from transferring, however the within the uncooked egg is liquid and simply retains spinning round.

Finally, the friction of the egg shell will slowly cease the liquid middle from spinning, and the egg will come to relaxation.

Egg Experiment for Kids: Raw Egg or Boiled Egg?

2. Egg Mass is Stable when Egg is Boiled

Contained in the laborious boiled egg, the mass is stable. When the egg shell stops, the middle of the egg can’t transfer anyplace, so it’s pressured to cease with the egg shell.

Do that egg experiment along with your youngsters, however earlier than you clarify to them the way it works, ask them for a concept on why the uncooked egg or boiled egg spins in another way.  

Energetic Time
2 minutes

Complete Time
2 minutes


Estimated Value


  1. Set your egg on a flat floor.
  2. Gently grip the egg between your thumb and fingertips and twist to softly spin the egg.
  3. Whereas the egg is spinning, contact the egg calmly to cease the spinning and carry off your finger.
  4. FOR HARD BOILED EGGS: the egg will stay nonetheless. FOR RAW EGGS: the egg will try to proceed spinning.

Extra Egg Science Experiments for Youngsters

Egg Drop challenge and egg drop experiment ideas for kids from Kids Activities Blog - egg shown wrapped up in bubble wrap and washi tape to be dropped
Let’s do extra egg experiments!

Egg Drop Experiment for Youngsters

One in all my favourite experiments in sixth grade science was the Egg Drop Experiment! Our trainer gave us virtually two week’s price of sophistication time to work with a companion and analysis one of the simplest ways to soundly comprise our uncooked egg in order that it wouldn’t break when dropped from the stairwell of the highest flooring of the college. 

See Youngsters Actions Weblog egg drop challenge ideas that work nice for homeschool, classroom or the science honest.

Have been you in a position to make use of the egg spin experiment to see in case your egg was uncooked or boiled? Did it work?

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