Students make a telephone using cups and string to explore how sound travels. Students design ways of changing the sound of their voices. They use different objects to talk through and explain why each object made the resulting change in sound. They demonstrate their scientific skills and processes by conducting investigations, recording their findings, and presenting their results. Skills and processes The teacher gives students three plastic bags, each with a bell inside.
Students describe the sounds produced and explain how each material affected how the sound traveled.
They record their observations and descriptions. The log should support students by allowing them to reflect on their science activities. These resources are those that have been evaluated since 1992. A complete list of resources to support this organizer can be found in Appendix B . For complete product descriptions, and ordering information, please refer to the Science Annotations booklet.