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Home » Early Years Science » Absorbing Experiments – Simple Science

Absorbing Experiments – Simple Science

Modified: Jun 14, 2020 · Published: Jan 26, 2012 by Emma Vanstone · This post may contain affiliate links · 13 Comments

Today we’re looking at materials which absorb water, in particular sponges. Can you make some predictions first based on your knowledge of the materials being used, and can you design a table to record your results? 

Definition of Absorb

Take in or soak up (energy or a liquid or other substance) by chemical or physical action.

Examples are a sponge absorbing a liquid or a car absorbing the shock of an impact.

Simple Absorbing Investigation

What you need:

  • A bowl or tub of water
  • Absorbent materials, such as sponges and wash cloths.
  • Non absorbent materials, such as plastic blocks or pencils.
tub of water and different sponges for an absorbing experiment

Instructions

  • Place the sponge in the water first to demonstrate how it absorbs the water. Does a dry sponge absorb better than a wet sponge? Can you hold the wet sponge up in the air without the water escaping?
  • Try the washcloth and show how it does absorb some water, but cannot retain most of it.
  • Place the plastic blocks and other non absorbant materials in the water and see what happens.
absorbing experiment

Why do sponges absorb water?

Sponges are made of loose fibers with lots of space between them. The holes between the sponge fibers absorb the water, and so the sponge material swells up with water. This stops the water coming out of the sponge when you lift it out of the water. When you squeeze the sponge you are forcing the water out of the holes in the sponge.

A damp sponge will absorb more water than a dry sponge as water molecules are highly attracted to one another.

What items would you use for an investigation like this?

More Absorbing Experiments for Kids

Little Bins for Little Hands has an investigation where they find out which materials absorb water.

This dinosaur waterproofing investigation is another fun way to find out which materials absorb water, although the idea here is to find materials which repel water instead!

Image of dinosaurs on a sheet of paper covered with different materials for a waterproof activity

Find out which materials absorb oil in this water clean up activity.

Tray of water with vegetable oil sprinkled over the top

Set up a washing line of pants ( Aliens LOVE Underpants style ) and find out which material absorbs the most water.

Aliens Love Underpants sciecnce
Collection of absorbing experiments for kids. Learn about absorbing and waterproofing materials #absorbingexperiments #scienceforkids

Last Updated on June 14, 2020 by Emma Vanstone

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  • 20 AWESOME Outdoor Science Experiments for Kids

Safety Notice

Science Sparks ( Wild Sparks Enterprises Ltd ) are not liable for the actions of activity of any person who uses the information in this resource or in any of the suggested further resources. Science Sparks assume no liability with regard to injuries or damage to property that may occur as a result of using the information and carrying out the practical activities contained in this resource or in any of the suggested further resources.

These activities are designed to be carried out by children working with a parent, guardian or other appropriate adult. The adult involved is fully responsible for ensuring that the activities are carried out safely.

Reader Interactions

Comments

  1. amymaze

    January 26, 2012 at 11:24 am

    Thanks for sharing this! I love finding simple science experiments for my kids and I’ll pin this for later use =)

    Reply
    • ScienceSparks

      January 26, 2012 at 8:12 pm

      Thank you. x

      Reply
  2. HELEN

    January 26, 2012 at 4:18 pm

    I’ve never really thought about this…very interesting! Liking the new look too! x

    ps I did get a bit hungry looking at the picture above of what I thought was roast beef….turns out it’s cinnamon sticks!

    Reply
    • ScienceSparks

      January 26, 2012 at 8:11 pm

      Ha ha! the mulled cider was good too though 🙂

      Reply
  3. Veronica

    January 26, 2012 at 5:22 pm

    Sometime that most simple experiments and activities are the funnest for little hands. This would be my two year old activity.

    Veronica @ http://watchmeplaynlearn.blogspot.com/

    Reply
  4. MsXpat

    January 26, 2012 at 6:05 pm

    My toddler will luv this! Will try over the weekend :0) Thanks for the tip.

    Reply
    • ScienceSparks

      January 26, 2012 at 8:11 pm

      Yay, let us know how you get on!

      Reply
  5. Love All Blogs

    January 26, 2012 at 8:13 pm

    Cool idea! I’ll have a bash with Queen Scamp!

    Reply
    • ScienceSparks

      January 26, 2012 at 8:15 pm

      Let us know how you get on!

      Reply
  6. Multiple Mummy

    January 29, 2012 at 12:15 pm

    Such a simple but clever and effective experiment!

    Thanks for linking to Family Frolics.:)

    Reply
  7. Rebecca

    January 30, 2012 at 2:35 pm

    So much fun as well. Its good to know the science behind it.

    Reply

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