Class LH have been investigating and exploring changes of the state of materials particularly water.
We examined 5 different tubs of ice and recorded adjectives
used to describe it – slippery, shiny, hard, cold, freezing, smooth, icy. We then made predictions about the five pots
to decide which would melt first and these were then placed around the classroom
– on the windowsill, the radiator and the front of the classroom. The other two were placed in the fridge and
the freezer.
During the day we did hourly observations and the first one
to melt was the one on the radiator after 1 hour 20mins. The one on the window sill was the next after
1 hour 50 mins. The ice tub at the front
of the classroom was the third to melt after 2 hours. At the end of the day we wrote up our results
and conclusions.
We talked about what people used to melt the ice when the
roads were icy and talked about salt being used. We then poured salt onto a new tub and
watched it virtually melt in front of our eyes.
We discussed how the particles changed from ice, to water
and to steam (gas) and looked at the steam from a boiling kettle.
The photos below show the class as an ice block (all huddled
together), the water (loosely standing near each other) and a gas all spread
around the classroom. The other photos
show how we were examining the ice to generate the adjectives and comparing the
ice blocks during the day.
