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Probably because many people have touched the materials so if you don't some of the bacteria could get into yourbody.

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Q: When you are done with an experiment why do you wash your hands?
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Why must we wash our hands after experiments?

You must wash your hands after an experiment so you don't contaminate yourself with anything harmful.


Should you wash your hands before you do an experiment?

Yes, you should always be sterile before performing any experiment as to not add any variables.


Why is it important to wash your hands after you an experiment?

As per the safety rules you must wash your hands after experimenting because when handling chemicals or bio-hazardous materials it might left some bacteria in your hands and you can be sick after that or you can get a disease. So always wash your hands with soap even though you wear gloves while experimenting.


What does the idiom to wash hands of it means?

Think about literally washing your hands and you can figure this out. If you wash something off your hands, you are getting rid of it. Washing your hands of something means you are done with it - you take no further responsibility or work no further on it.


how to wash your hands?

wash your hands :)


What are the safety precautions you must take when testing for starch?

You must make sure that you wash your hands after you finish doing the experiment.


Is it nasty if you pick your booger with your finger and you wash your hands after when you are done picking your booger?

yes


Why is it important to wash your hands and when you need to do it?

so that you don't get sick off of the germs that you pick up when you touch anything!!! it's very important to wash your hands when you are done doing anything!!


Why do you have to wash your hands before and after a experiment?

Before so everything stays consistent and after so you're not all germy and stuff. :D


What is wrong with this sentence Employees must wash your hands?

It is supposed to be wash their hands not your hands because that wiuld be weird having someone wash your hands for you.


What do girls do when they're done peeing?

Wipe dry and then pull up there pants and flush. Wash hands.


Are food workers required to wash their hands?

Yes. Every state requires food workers to wash their hands. It is done to stop the spreading of diseases like E. Coli.