Friday, 7 October 2016

Tuesday, 4 October 2016

Science AND grammar!

Today children in class 5 learned about science and grammar at the same time. They worked in pairs (reflecting on yesterday's science learning) to match main and subordinate clauses creating complex sentences about the results of yesterday's investigation. It was great fun and they learned lots too!

Separating materials

Following the investigation yesterday, year 5 wanted to find out if it was possible to separate a salt water solution. The children made a variety of predictions before we began. We carried out an investigation as a whole class, carefully observing the changes as the solution was heated. The children learned that as the water was heated, it evaporated leaving the salt behind.

Monday, 3 October 2016

The inventing room incident!

Class 5 were busy working scientifically this afternoon. They needed to use their knowledge of solids, liquids and gases to decide how to separate materials. The children used sieves, funnels, filter paper and magnets to try and separate a mixture of water, salt, cocoa powder, raisins, cherries and paper clips! Plans were hatched and predictions made, then the mess began!
There were some interesting approaches to separating the materials, yet most groups decided to use the sieve to separate the cherries and raisins and the magnet to remove the paper clips from the mixture. 
Then there was the problem of the cocoa powder! If the cocoa powder had not been stirred (therefore had not dissolved), it floated on the top of the water so it was possible to scoop it off with a spoon, but once dissolved, it was tricky to figure out how to get it out of the water. 
Similarly, how could the salt be removed? Some children hypothesised that if they heated the water/salt/cocoa powder solution, the dissolved solids (salt and cocoa powder) would rise up to the top so they could be scooped off? We will investigate further tomorrow.

This is the chocolatey, salty water we were left with. How could we separate these materials?