Old Mouldy Bread

Before our current isolation we began a science experiment. We wanted to see the difference in the way mould would grow on bread that had been treated in different ways. We used bread that was:

• not touched
• touched with unwashed hands (after playing at lunch time)
• touched with hands cleaned with sanitiser
• touched with hands washed with soap and water
• touched with chrome book keyboards

We talked about how food that is good for us should eventually go mouldy and rot, then we predicted which pieces of bread would grow mould the quickest and why we thought this (our hypotheses).

Here they are on Day 1 (19th March 2020)

Luckily I remembered to bring them home with me instead of leaving them on the classroom wall...

Here's how they looked on Day 7 (26th March 2020)

Not touched

Unwashed hands

Hand sanitiser

Washed with soap and water

Wiped on chrome book keyboards

And then on Day 10 (29th March 2020)

Not touched

Unwashed hands

Hand sanitiser

Washed with soap and water

Wiped on chrome book keyboards


 Day 19 (7th April 2020)

Not touched

Unwashed hands

Hand sanitiser

Washed with soap and water

Wiped on chrome book keyboards

Wow...they certainly have changed! 

Do you have any thoughts, observations or questions about the results so far?