How does food coloring changing the color of celery?

The process of food coloring changing the colour of celery involves several steps:

1. Capillary Action: Celery stalks have tiny channels or vascular bundles that transport water and nutrients throughout the plant. These channels act like tiny straws.

2. Cutting the Celery: When you cut the celery stalk, you expose the cross-section of the vascular bundles, creating tiny openings.

3. Food Colouring: When you place the cut celery stalk into a container filled with food colouring, the coloured water is drawn up into the vascular bundles through capillary action.

4. Absorption: The celery stalks absorb the food colouring water through the tiny channels in the vascular bundles. The food colouring molecules move upwards, carried by the water that is naturally transported through the plant's vascular system.

5. Diffusion: As the food colouring water rises through the celery stalk, the food colouring molecules spread out and diffuse into the surrounding plant tissues.

6. Colour Change: The food colouring molecules interact with the cellular components of the celery, causing a change in colour. The celery stalk gradually takes on the colour of the food colouring.

7. Time Factor: The amount of time it takes for the celery to fully change colour depends on the concentration of the food colouring and the size of the celery stalk. Thicker celery stalks may take longer to absorb the colouring.

8. Water Movement: The movement of the food colouring water through the celery stalk is driven by the natural process of transpiration, which is the evaporation of water from the leaves of the plant.

By exploiting the natural water transport system of the celery stalk, food colouring can be effectively absorbed and distributed throughout the plant, resulting in a change in colour.