Introduction

This rich task is designed to introduce a simple inquiry with easily accessible hands-on materials. This task introduces students to the fundamentals of inquiry-based learning (IBL) through hands-on exploration of sound using hollow tubes. Through guided inquiry, students engage in observation, hypothesising, planning, and conducting a practical experimental activity (with a focus on controlling variables), thereby developing scientific thinking and inquiry skills. With small children (or beginner learners/teachers in IBL) in focus, the number of variables, constants and objects involved is limited. No measurements and/or calculations are required. The extension of designing a set of flutes and forming an orchestra to play a popular tune offers a challenge and motivation for further work, an opportunity for social bonding, or a simple, fun conclusion to the lesson.

Students are asked to observe and compare different tubes, noting both differences and similarities. They produce sounds by tapping the tubes on their palms and hypothesise which property of the tube influences the pitch of the sound. Guided enquiry then follows, focusing on a fair test by choosing variables and constants appropriately to find the answer.

The task also serves as an interdisciplinary bridge between science, physics, and music, suitable for a wide age range, from preschool to university level. Beyond science content, the task fosters social interaction, especially when used at the beginning of the school year to build group dynamics and cooperation among unfamiliar classmates.

Task Description

Students are presented with a set of hollow tubes varying in length, diameter, material, colour, elasticity, and wall thickness. First, they observe and compare these tubes to identify similarities and differences. Then, by tapping the tubes against their palms, they explore the sounds produced and compare pitches. They are encouraged to hypothesise which property of the tube affects pitch.

This leads to the formulation of a guided inquiry question: “How does (chosen property) affect the pitch of the tube?” Students then design a fair test to investigate this hypothesis, selecting appropriate variables and constants. Working in small groups, students perform the experiment with a subset of tubes and report on their findings, highlighting how they controlled variables to ensure valid results. A musical extension allows students to participate in a simple classroom orchestra, with each student playing a note by tapping a tube when prompted by the teacher using a projected musical sheet.