Celebrating Science : Activities 1-2

Enjoy our range of fun science experiments for kids this week that will feature awesome hands-on activities that help bring the exciting world of science to life! 
Here are the Science Activities for today!
#Science Activity 1: Does an Orange Float or Sink?

Does an orange float or sink when placed in water? Seems like a fairly straight forward question, but is it? Give this fun density science experiment for kids a try and answer the question while learning a unique characteristic of  oranges.

What you will need:
  • An orange
  • A deep bowl or container 
  • Water
1.    Fill the bowl/ glass with water.
2.    Put the orange in the water and watch what happens.
3.    Peel the rind from the orange and try the experiment again, what happens this time?

What's happening?

The first time you put the orange in the bowl of water it probably floated on the surface, after you removed the rind however, it probably sunk to the bottom, why?

The rind of an orange is full of tiny air pockets which help give it a lower density than water, making it float to the surface. Removing the rind (and all the air pockets) from the orange increases its density higher than that of water, making it sink.

Density is the mass of an object relative to its volume. Objects with a lot of matter in a certain volume have a high density, while objects with a small amount of matter in the same volume have a low density.

#Science Activity 2 : Diet Coke & Mentos Eruption

One of the most popular experiments of modern times is the Diet Coke and Mentos Geyser. Made popular by Steve Spangler, this experiment is a lot of fun and sure to amaze your friends and family (assuming you do it outside rather than in the living room) 

What you will need:
  • Large bottle of Diet Coke
  • About half a pack of Mentos
  • Geyser tube (optional but makes things much easier)
1.  Make sure you are doing this experiment in a place where you won't get in trouble for getting Diet Coke everywhere. Outside on some grass is perfect, please don't try this one in your drawing room!!

2.    Stand the Diet Coke upright and unscrew the lid. Put some sort of funnel or tube on top of it so you can drop the Mentos in at the same time (about half the pack is a good amount). Doing this part can be tricky if you don't have a geyser tube.

3.  Time for the fun part, drop the Mentos into the Diet Coke and run like mad! If you've done it properly a huge geyser of Diet Coke should come flying out of the bottle, it's a very impressive sight. The record is about 9 metres (29 feet) high!

What's happening?

Although there are a few different theories around about how this experiment works, the most favored reason is because of the combination of carbon dioxide in the Diet Coke and the little dimples found on Mentos candy pieces.
The thing that makes soda drinks bubbly is the carbon dioxide that is pumped in when they bottle the drink at the factory. It doesn't get released from the liquid until you pour it into a glass and drink it, some also gets released when you open the lid (more if you shake it up beforehand). This means that there is a whole lot of carbon dioxide gas just waiting to escape the liquid in the form of bubbles.

Dropping something into the Diet Coke speeds up this process by both breaking the surface tension of the liquid and also allowing bubbles to form on the surface area of the Mentos. Mentos candy pieces are covered in tiny dimples (a bit like a golf ball), which dramatically increases the surface area and allows a huge amount of bubbles to form.

Stay tuned daily for more interesting kids activities this week! Feel free to send in your ideas and comments.

Team Avishkaar Box
+91 8506931515

Celebrating Science : Activities 1-2 Celebrating Science : Activities 1-2 Reviewed by Avishkaar Box on 05:22 Rating: 5

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