Experimenting with heat...

In our last Science class we researched the transfer of heat through waves.
Through an experimental activity, we understood how hot water goes upwards, hile cold water goes downwards.

Mr Steve Spangler performs a similar activity in the following video.
In a rather...impressive way...!

Watch the video here:

and... try it out at home.
The only things needed are a little coloured water, two same bottles and a playing card.

You can find more fascinating experiments on Mr Spangler's channel on youtube:
http://www.youtube.com/user/SteveSpanglerScience

Original post by Dimitris Alexakis

Volcanoes...strictly for school use!

They are kids and they come up with ideas! All the time! The idea that had settled itself in their minds at that period was to make volcanoes!
They weren't interested in seeing images and videos, the point was that they saw the red lava flowing in front of their eyes!
The day when a student brought from home his mum's...cooking tray to build in it his own volcano, I realised that it couldn't wait any longer...
Venture "Volcano" so begins...

What we needed:

A bottle of orange juice (which was our "volcano") and clay to build its slopes as life-like as possible!

...science time had come...

We put some cooking soda, some water and a little washing-up liquid in a small funnel and into the volcano...but nothing happened!

Something is needed to make the soda foam to create our lava!

What would that be?

Vinegar (with a few drops of red ink to make our lava red)!

...and the result was something like this:

 

This was one of the two volcanoes that was made by the 5th
grade students (school year 2009-2010)

Original post by Maria Priniotaki