How to make an egg float
Last weeks experiment showed how to make an egg shell disappear, this week we are showing you more science magic and showing you how to make an egg float.
What you need
- A bowl or large glass
- Tap water
- Table salt
- Egg
Instructions
- Fill the bowl or glass about 2/3 full with tap water.
- Drop the egg carefully into the bowl and observe it sinking to the bottom.
- Remove the egg and add salt, I added about 5 tablespoons then tried it again, adding more and more until it floated.
Here you can see the egg floating.
The Science Bit
Objects sink in water when they are more dense than the water, by adding salt we make the water more dense, once the water is denser than the egg it floats.
You could also try other objects and see what else you can make float. You can see more sinking and floating fun here.
MsXpat
January 23, 2012 at 3:43 pmThis is one of the first science ‘tricks’ I remember from primary school days :0) its cool!
Betsy
January 23, 2012 at 4:05 pmI love science experiments like this! Can’t wait to try it.
ScienceSparks
January 26, 2012 at 8:12 pmLet us know if you enjoy it!
maggy,red ted art
January 26, 2012 at 6:20 pmMmmh, I am sure I was told a floating egg is a bad egg.. is this how you can play tricks on people too? 🙂
Thank you for sharing on Kids Get Crafty!
Maggy
ScienceSparks
January 26, 2012 at 8:11 pmha ha :-))
Veronica
January 26, 2012 at 7:29 pmWhat a fun experiment. I can’t wait to put this experiment into our science lessons. I can’t believe how many fun experiments you do on your site. Educational and fun.
-Veronica @ http://watchmeplaynlearn.blogspot.com/
ScienceSparks
January 26, 2012 at 8:10 pmwow, thank you. That is so lovely to hear. x
Brooke, Let kids create
January 30, 2012 at 5:49 amThat is so cool. I never knew you could do that (unless the egg was bad) Thanks for sharing on Monday Madness.
ScienceSparks
January 30, 2012 at 12:42 pmSo glad you like it!
Mom to 2 Posh Lil Divas
February 4, 2012 at 1:38 pmoh, you know I LOVE it! Keeping this in my back pocket for around Easter – perfect!!!
thanks for sharing on the sunday showcase! I pinned this!
Emma bloomfield.
March 17, 2015 at 10:27 pmI am doing this to show my class room 6.
Yusuf Kariem
March 29, 2017 at 2:18 pmWow so cool
Had fun helping my daughter make it