How long can the beads with sunscreen stay in the sun before they change colour? Objectives Observe the effect of ultraviolet radiation. Explain the effect of sunscreen on UV light. Materials Per Class or Group: a sunny day! What To Do Divide the beads into two groups.
Cover one group of beads with sunscreen. Take the beads outside into the sun. Watch what happens to the beads with sunscreen and the beads without.
Make a UV—detecting bracelet or zipper-pull by stringing UV beads on a pipe cleaner. Extensions Experiment further by placing beads on a windowsill and test how fabric, window coverings, plain glass or cellophane may block UV light. Experiment with the length of time it takes beads to change colour. Can you build a UV "clock"?
Try sunscreens with different SPF. How does this effect the length of time before the beads change colour? Related Resources Chemical Light Reactions Light is a wave of energy, and not all energy wavelengths are visible to the human eye. In this unit, students…. Colour and Light How are rainbows made?
What makes grass green and jeans blue? How do sunglasses work? In this series…. Polarizing Filters In this exploration, students will learn how polarization works and its practical application in our everyday lives.
Our main campus is situated on the Haldimand Tract, the land granted to the Six Nations that includes six miles on each side of the Grand River. Our active work toward reconciliation takes place across our campuses through research, learning, teaching, and community building, and is centralized within our Indigenous Initiatives Office.
Skip to main Skip to footer. Engineering Science Quest. Beads that change colour in ultra violet light. How it works Light travels in a wave. If your beads are changing colour you should probably put on some sunscreen! Try putting sunscreen on your beads, or try blocking the sun with dierent materials. Which is most eective at blocking harmful UV rays?
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