Capillary action is the movement of liquid through tiny spaces without external force. In hydroponics, wicks use capillary action to draw water upwards, keeping plant roots moist without using pumps or electricity.
Class 8 Vocational Education Chapter 1 Hydroponics: Growing Plants without Soil question answer
Class 8 Vocational Education Textbook Work with Life Forms Chapter 1 Hydroponics Growing Plants without Soil question answer
Capillary action is the process where liquid moves through narrow spaces or tubes due to surface tension and adhesive forces, even against gravity. In hydroponics, this principle is used in the wick method. A cotton wick pulls nutrient-rich water from the container below into the growing medium. This helps deliver moisture to plant roots steadily, without the need for any pumps or power, making it perfect for simple systems.