The Year 6 students have enjoyed an incursion with Cecily Arkell from Earth Science WA. The role of ESWA is to create, produce and deliver innovative, valuable earth sciences experiences to students and the community and to emphasise the importance of earth sciences in understanding contemporary issues.
Our incursion commenced with a study of a map of WA to identify the various minerals and rocks and determine their age.
Our first task was to learn how to effectively use a magnifier.
Cecily introduced the activity. The students investigated the chemistry of soils, testing for lime to help out a farmer with their crop (via a simple test with vinegar). WE found out that calcium carbonate (lime) is also in Caltrate. We tested a few drops of vinegar on a Caltrate tablet.
We investigated other rocks to see if the acid in the vinegar would make a change to the rock.
We concluded the investigation by sharing our findings for each of the three rocks. Mrs Cogger recorded the students responses in the Class Science Journal.
We would like to that Cecily for coming to St Emilie’s and sharing her geology knowledge with us. She triggered many new ideas and questions with the students and answered their queries about earthquakes too.
Cecily told us about the two or possibly three ‘cratons’ that make up the WA region. One is the Pilbara craton and the other is Yilgarn. She told us that there is a third craton but she couldn’t remember the name of it. So Josh Jain did some research and Cecily’s reply is – ‘On the cratons – I’m so happy that he did some research so quickly!! He’s not quite on the right track though as Woodleigh is a crater (from a meteorite impact). I now realise there are only two cratons (Pilbara and Yilgarn) and many basins that make up WA’.
The students also received this nice compliment from Cecily – ‘Thank you for having me again and I really loved working with such bright and engaged students. They really are a credit to the school and yourself’.