Plants Absorbing water

Materials

Glass jars x 4 

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 half way 

Put approximately 10 drops of different coloured food colouring into each jar

Place a celery stick or a cabbage leaf into each jar

Aim-

To colour celery or cabbage leaves

Explanation 

Part 1 - Explain why plants need water 

Plants, like all living things, need water to survive. They use water to maintain their shape and  save energy through photosynthesis, they also collect dissolved nutrients from the soil, their body needs to stay hydrated with water,It helps them stay strong,flexible and helps their body stand and on warm  days water helps the plants stay cool.

Part 2 - How they absorb water-

Plants obtain water from the soil. The roots are the transportation system to get the water from the soil to the parts of the plant where it is needed the most. Then the roots branch off into smaller and smaller and the tiniest roots are called root hairs. These root hairs consume the water into the system, which then carries the water to the rest of the plant.  Once a water molecule escapes out into the atmosphere. It pulls the next molecule below it to take its place. Then it pulls the one under it to take its place that continues on forever and ever. This job of attracting molecules to the others place is called cohesion. Due to this cohesion, water molecules stick to each other forming a continuous chain.