Tag: Education

Water Purification - Why is alum added to water? | #aumsum #kids #science #education #children

Water Purification – Why is alum added to water? | #aumsum #kids #science #education #children



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Topic: Water Purification
Why is alum added to water?
Because water does not like to be alone.
It wants somebody’s company.
No. Alum is added to purify water.
Alum is aluminium sulfate.
It acts as a coagulant.
A coagulant attracts and binds with extremely fine and small particles to form a large particle.
I won’t use it.
But why?
Because it will attract all small insects and make a large insect.
You are just unbelievable.
When a solution of alum is added to impure water, it attracts and binds with contaminants and fine suspended particles of mud, dirt, etc. to form large particles.
Being large, these particles can be removed by filtration, or when they settle down due to gravity, they can be removed through decantation, giving us pure water.

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Original Video Source

April 15, 2021
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Learning Space: Make a Water Filter

Learning Space: Make a Water Filter



In this episode of Learning Space, you’ll use materials from around your home to build a device that can clean a dirty water sample like the water filtration system on the International Space Station. Materials and step-by-step instructions are available at:

Looking for space and science activities you can do with NASA at home? Our new Learning Space page has video tutorials, DIY projects, slideshows, games and links to more you can see and do with NASA. And we’ll be adding more all the time! Check it out at

Original Video Source

July 17, 2020
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