Round, Light and Hollow

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In this activity about bones (page 12 of PDF), learners investigate and compare the weight-bearing capacity of solid and hollow cylinders. Learners then make inferences about bone structure and observe the interior of cleaned long bones of chickens. This guide includes background information, extensions, and data sheets.

Quick Guide

Preparation Time:
5 to 10 minutes

Learning Time:
1 to 2 hours

Estimated Materials Cost:
$1 - $5 per group of students

Age Range:
Ages 6 - 11

Resource Types:
Activity, Experiment/Lab Activity, Lesson/Lesson Plan


Materials List (per group of students)

  • heavy-weight balance or bathroom scale
  • poultry scissors or small saw
  • 2 bathroom-sized paper cups
  • 6-10 heavy, stackable items (bricks, cans, reams of paper or books)
  • 1/3 cup dried beans
  • sheet of corrugated cardboard
  • 1 long bone from a chicken leg or thigh that has been cooked and cleaned
  • magnifiers
  • copy of "Weighing 'In'" and "Hollow or Solid?" student sheets


  • Life Sciences
    • Diversity of Life
      • Animals
    • Human Body
      • Skeleton
  • Mathematics
    • Data Analysis and Probability
      • Data Analysis
      • Data Collection
      • Data Representation
    • Geometry
    • Measurement
    • Number and Operations
    • Reasoning and Proof
  • The Nature of Technology
    • The Design Process
      • Problem Solving
  • Physical Sciences
    • Structure and Properties of Matter
      • Mass and Weight
  • The Nature of Science
    • The Scientific Process
      • Conducting Investigations
      • Gathering Data
      • Formulating Explanations
      • Communicating Results

Informal Categories

  • Animals


To use this activity, learners need to:

  • see
  • read
  • touch

Learning styles supported:

  • Involves teamwork and communication skills
  • Involves hands-on or lab activities


This resource is part of:

Access Rights:

  • Free access



  • All rights reserved, Baylor College of Medicine, 2000

Funding Source:

  • NASA, NCC9-58