16 June 2017

Year 4 science and geography coastline excursion

​Scientist Emeritus Professor Bruce Graham Thom (OA) (and grandfather of Mackenzie,​​ Y4) led the girls on a tour of Bondi Pavilion, Bondi Icebergs and to Mackenzies Point. He helped the girls understand the cause and effect relationships of weathering and erosion on landforms, pointing out honeycomb weathering, chemical erosion, and wave and wind action.

Tess Burgess commented, "I found it so interesting that scientists don't have all the answers. I learnt all about weathering and erosion. Did you know that the magic of Bondi Beach is that the sand never leaves?"

Sienna Durante asked Professor Thom, "What erosion is the worst?" He said, "Side-slipping. That is when the hills or mountains have pieces that just slide off. That means some of those houses might need pillars so they don't fall off in thousands of years!"

Isabella Browning said, "I didn't know that there was a type of weathering called honeycomb weathering. I now know that it is when the salt in the ocean water hits the rock, causing lots of holes."

The challenge for Year 4 is to now consider how human activity influences changes to the Earth's surface. Students will be encouraged to think critically about the impact of human activity along the coastline, especially later in the year when Sculptures by the Sea is held. Can our resident Year 4 geologists suggest strategies to minimise erosion or make predictions about this landscape in the future? Watch this space!