4b @ C.E.T.N.S.

Follow our everyday adventures in our classroom!
  • Home
  • About
  • Homework
  • Useful Links
  • Student Work
  • Gaeilge
  • Maths
  • Home
  • About
  • Homework
  • Useful Links
  • Student Work
  • Gaeilge
  • Maths

September 19th, 2016

9/19/2016

0 Comments

 

How can a ship like the Titanic float, but a pebble sink?

Picture
Picture
Picture
This was our scientific question last week. We investigated this by placing a ball of Plasticine in a bowl of water and observing it sinking to the bottom. We then took that same ball of Plasticine and molded it into a shape that would float.  We then had to work in groups to design a boat with a sheet of tinfoil and see which boat would hold the most marbles before it sank.
Here are the results:
Minecrafters: 17 marbles
Pokemons: 6 marbles
Emojis: 7 marbles
Septic Eyes: 45 marbles (wow!)
Neons: 7 marbles
We learned that  when a boat floats, it pushes aside (i.e., displaces) water to make room for itself. But, the water around the boat pushes back. And the more water a boat displaces, the more force there will be pushing back on the boat. This force supports the boat. Boats that displace a lot of water can generally carry a heavier load than boats that displace only a little water.
We concluded that big boats hold more marbles; strength—sturdy boats don’t crumple under a load; and stability—wide boats don’t roll over as easily as narrow boats.
0 Comments



Leave a Reply.

    Author

    A blog following the learning activities, experiments and projects of the children of 4B at C.E.T.N.S.

    Archives

    June 2017
    May 2017
    March 2017
    February 2017
    January 2017
    November 2016
    October 2016
    September 2016

    Categories

    All
    Homework

    RSS Feed

Powered by Create your own unique website with customizable templates.
4B
  • Home
  • About
  • Homework
  • Useful Links
  • Student Work
  • Gaeilge
  • Maths
  • Home
  • About
  • Homework
  • Useful Links
  • Student Work
  • Gaeilge
  • Maths