What is absorption?
Absorption can be define as taking one thing into the area of another. A good example is 'a sponge'. A sponge will absorb or take in water from another area and put it inside of itself.
Which type of materials can absorb water?
Some materials can absorb water while some cannot. The materials that can absorb water are called "absorbent materials" . The materials that cannot absorb water are called "non-absorbent materials".
Absorbent materials:
* textile product that are made of cloth (cotton, silk, wool) such as t-shirt, sock, shirt, handkerchiefs, pyjamas, blanket, carpets, ties, jeans, ties, towels and the others
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| towel |
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| pyjamas |
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| shirt |
* objects that are made of cotton for example cotton bud, coffee filters, cotton wool, face cotton, floor mop, thread and others.
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| cotton buds |
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| face cotton |
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| floor mop |
* objects that are made of wood such as envelopes, toilet roll, books, tissue paper, newspaper and others. Other than that, coconut-husk and tree trunk also can absorb water.
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| newspaper |
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| tissue paper |
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| toilet paper |
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| tree trunk |
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| coconut husk |
* other objects such as sponges (natural and synthetic) and feathers.
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| feather |
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| sponge |
Non-absorbent materials:
* objects that are made of metal for examples, key, nail, paper clips, tin can, coin and the other.
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| nails |
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| key |
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| paper clip |
* objects that are made of rubber for examples tyre, eraser, rubber gloves and others.
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| tyre | |
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| rubber glove |
* objects that are made of plastic for examples plastic bag, plastic ruler, plastic pail, rain coat, cutting board, umbrella, tent, and others.
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| rain coat |
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| tent |
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| plastic ruler |
* objects that made of glass such as window, mirrors and the others.
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| glass |
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| mirror |
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| window |
* other objects such as pebbles, stones and marbles.
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| marbles |
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| stone | |
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| pebbles |
Absorption ability are different from materials to materials.
Experiment:
1) Materials needed
2) Count how many teaspoonful of coloured water can be absorbed by each type of material.
3) Observations
Conclusion:
Different materials have a different ability to absorb water. Some materials can absorb more water than others. A towel can absorb more water than a tissue paper and handkerchief. In our daily life, we should wore cotton clothes in hot weather because they can absorb more water than other materials cloth. Absorbent materials absorbs water and make our life more convenient and comfortable.
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