This document outlines an experiment to investigate how soaking chicken bones in vinegar affects their structure over time compared to soaking in water. The experiment involves soaking one chicken bone in vinegar and one in water for at least three days, then observing any changes and soaking for another week to see further effects before discussing and drawing conclusions about why vinegar may have changed the bone's structure.

1. RUBBERY BONES
YEAR 8 – BODY SYSTEMS

2. AIM & HYPOTHESIS
Aim: To investigate the
effect of vinegar on
bones.
Hypothesis: (Write your
hypothesis here)

3. EQUIPMENT
• 2 chicken bones
• 2 beakers
• vinegar
• water

4. RISK ASSESSMENT
Risk
Injury
Prevention
Fill out a risk assessment for your experiment

5. METHOD
1. Clean the two chicken bones and
place one bone in a beaker of
vinegar and the other in a beaker of
water so that the bone is submerged.
2. Allow the bones to soak for at least
three days. Then remove the bones
and observe any changes. Take a
photo of your results.
3. Return the bones to the beakers for
another week, then remove and
observe any further changes in the
bones. Try to tie the bones in a knot.
Take a photo of your results.

6. RESULTS
• Write your observations here and display any photos
here.

7. DISCUSSION
1. What changes occurred in each of the two bones?
2. How did the bone change after more than a week in
vinegar?
3. Why do you think the bone in the vinegar changed
the way it did?
4. Why was the beaker of water used in the first part
of this experiment?

8. CONCLUSION
• Write a conclusion for your experiment here.