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.