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Book 30, Question 116 · Video

Can a plastic bottle and sunshine clean water?

Video · 1:50 · Crafty Clover explains, from A Million Whys Book 30

In some sunny places, families clean water with a method called SODIS. They fill clear plastic bottles with clear water and set them in strong sun for about six hours. UV light and heat from the Sun work together to kill many germs. It works only for water that is not muddy, and it takes sun and patience. It's one low-cost way to make water safer.

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What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Can a plastic bottle and sunshine clean water?

The Big Idea

Sunshine can help clean water! With just a clear bottle. How?

The Method

Step one: The Method. In some sunny places, families clean water with a method called SODIS. They fill clear plastic bottles with clear water and set them in strong sun for about six hours.

Sun Power

Step two: Sun Power. UV light and heat from the Sun work together to kill many germs. The bottles are often laid on a roof to catch the most sun.

Limits

Step three: Limits. It works only for water that is not muddy, and it takes sun and patience. It's one low-cost way to make water safer.

A Closer Look

Let's take a closer look! Lets light in. Not muddy. UV and heat. Be patient.

Quick Facts

Quick facts! The method was developed by researchers in the 1980s. UV and heat work together. Muddy water won't work. It's very low-cost.

Think Like a Scientist

Now, think like a scientist! Fill a clear bottle with water. Measure its temperature. Leave it in the sun all day. Measure again. Don't drink it, but how warm did it get?

Outro

In some sunny places, families use SODIS: filling clear plastic bottles with clear water and setting them in strong sun for about six hours. UV light and heat work together to kill many germs, but it only works for water that isn't muddy. Science is amazing! What will you discover next? Every question is a new adventure, so keep wondering and keep exploring with me! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

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