1. Materials and Light 16th May 2007 Form Group 8_Y

2. True or False? The Sun is one example of a non-natural source of light. Light travels in straight lines directly into our esyes. Sound travels faster than light. False TrueFalse

3. 6. Opaque materials do not allow light to pass through them. 7. Transparent materials allow light to pass through them. 8. A material that is translucent only lets part of the light through.

4. Practical Activity Shading Chart 100% 75 % 50 % 30 % 25 % 0% 2.5 % 5 % 15 % 20 % MaterialsOpacity Microscope slides Tissue paper A4 sheet Colour Paper

5. What do you really know? 1. Materials that allow light to pass through tem are called ___________. 2. ________materials do not allow light to pass through them. 3. _________ materials let part of the light to pass through. opaque transparent translucent