Bright Science Sparks

 

“The Shadow Proves the Sunshine” –  Switchfoot

The year 4’s have just completed a week of shadow investigation. On Monday morning we set out with a mission to discover how shadows move and change throughout the day. We started our lesson in groups by answering questions about shadows and light, discussing what we already know and what we still need to learn. It was key for every group to cooperate with one another by being polite and kind to the other members of the group. Sharing and taking turns was also a key factor in working towards a group agreement on their answers.

Our research starting point was making predictions about how the shadow would move or change. A simple upright pencil on cardboard was all we needed to set this test in motion. Our first observation was that light always travels in straight lines. Anything in the way would cause a shadow. Throughout the day, in fact every hour, we witnessed that our shadow moved to the east. Our pencil shadow was long in the morning. As the day progressed the shadow became shorter, being the shortest at noon. After midday the shadow of the pencil slowly grew in length again.

Our testing was not yet complete! Working in groups again, we investigated which objects were transparent, translucent and opaque. We also discovered that we could change the size of our shadow by moving closer or further away from our light source. After collecting and recording our observations over the course of the week, all our findings were crafted into games.

Looking back over this week it is clear that every Year 4 student has taken ownership in this investigation. In return, this will create a sure scaffolding for future light exploration.

Carol Blake

Year 4 Teacher