Tuesday, November 19, 2019

plants absorbing water



Plants Absorbing Water 
Aim:
To colour celery or cabbage leaves - Try and see how plants absorb water

Materials 
Glass jars x4 
Celery
Cabbage leaves 
4 different colours of food colouring 
Water 
Scissors/knife/chopping board to cut the celery

Method 
Fill up 4 glass jars up to around halfway 
Put approximately 10 drops of different coloured food colouring into each jar
Place a celery stick or a cabbage leaf into each jar

Explanation 

Part 1 - Explain why plants need water 
Plants need water to absorb nutrients from the soil they also need water to grow to the right size and not die.


Part 2 - How they absorb water
Plants absorb water through their entire surface through roots, stems and leaves. Because of this movement of water molecules, it’s absorbed by the root hairs through cell membranes from the soil. Then the root hair cells become more and their osmotic pressure falls.  Osmotic means the movement of water molecules through a structure.


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