우리 손에 얼마나 많은 세균이 있는지 알아보는 과학실험 Moldy Bread Science Experiment Is a Gross...

 

Moldy Bread Science Experiment Is a Gross Reminder of How Many Germs Are on Our Hands

By Sara Barnes on December 23, 2019

Have you ever wondered how many germs are lurking on your laptop? Or what happens when you don’t

Moldy Bread Experiment Pictures

우리 손에 얼마나 많은 세균이 있는지 알아보는 과학실험

  얼마나 많은 세균이 노트북에 숨어 있는지 궁금해 본 적이 있는가? 아니면 손을 씻지 않으면 어떻게 될까?

교육자 Jaralee Metcalf와 Dayna Robertson은 C.S.를 통해 발견되는 실험을 했다. Mott Children's Hospital 웹사이트를 통해서 여러분의 손과 장치에 얼마나 많은 박테리아가 있는지 확인할 수 있다.

이 실험은 세균의 축적을 설명하기 위해 얇게 썬 빵을 사용하며, 교사들은 각각 다른 단계의 청결함을 나타내기 위해 다섯 조각을 사용했다. 한 조각은 손대지 않고 그대로 두었다. 다른 것들은 씻지 않은 손으로, 세정제로 손을 닦은 것, 따뜻한 물과 비누로 손을 씻은 것. 그리고 한 조각의 빵이 교실 모든 노트북에 문질러졌다. 그리고 나서 그들은 조각들이 어떻게 반응하는지 보기 위해 빵을 며칠 동안 내버려두었다.

 

실험 결과는 항상 손을 씻어야 한다는 것을 상기시켜 줄 것이다. 비누와 물의 경우는 곰팡이가 피어 있지 않은 유일한 것이었다. 손세탁의 대용품이라고 생각할 수도 있는 손세정제까지 곰팡이의 증거를 보여주었다. 하지만 가장 역겨운 결과는-손 씻지 않은 손으로 만져지고 노트북에 문질러진 빵 조각들이다. 노랗게 질린 곰팡이가 표면에 펼쳐져 있었고 초록색 패치가 보이기 시작했다. 컴퓨터 슬라이스는 더 심했고 거의 완전히 녹색으로 변해 있었다.

황기철 콘페이퍼 에디터 큐레이터
Ki Chul Hwang editor curator
edited by kcontents

Educators Jaralee Metcalf and Dayna Robertson conducted an experiment, found through the C.S. Mott Children’s Hospital website, that will open your eyes to just how much bacteria is on your hands and devices if left uncleaned.

The experiment uses sliced bread to illustrate the accumulation of germs, and the teachers used five pieces to each represent a different phase of cleanliness. One slice (the control) was left untouched. The other pieces were handled by all of the students in the following states: with unwashed hands, hands cleaned with a sanitizer, and hands washed with warm water and soap. In addition, a piece of bread was rubbed on all of their classroom laptops. They then left the bread alone for a few days to watch how the slices reacted.

The results of the experiment will remind you that you should always wash your hands. Aside from the control piece, the soap and water slice was the only piece of bread that had no mold on it. Even hand sanitizer, which we might think as a substitute for hand washing, showed evidence of mold. But the most disgusting outcomes—by far—were the bread slices touched by unwashed hands and wiped on the computers. The unwashed hands had yellowish mold spread across its surface with some green patches starting to show. The laptop slice was even worse and had turned almost completely green.

Metcalf and Robertson’s moldy bread exercise was documented in a series of photos and they now serve as a powerful classroom tool to remind their students to always wash their hands. And in Metcalf’s now-viral Facebook post, it is reminding people from around the world to do the same.


Educators Jaralee Metcalf and Dayna Robertson conducted a moldy bread science experiment that is a powerful reminder for you to always wash your hands.

 

 

The teachers and their students each touched four slices of bread in different states of cleanliness. One piece of bread was untouched and was the control for the experiment.

 

The bread touched with hands cleaned with soap and warm water didn’t have any mold, but the other slices…

 

 

were gross! Especially the piece that had been rubbed on classroom computers.

Jaralee Metcalf: Facebook | Instagram

My Modern Met granted permission to feature photos by Jaralee Metcalf.
kcontents