RESEARCH METHODOLOGY

Detailed explanation-1: -In this experiment, the addition of fertilizer is the independent variable manipulated by the scientist. Plant height is the dependent variable that responds to the change in the independent variable. Each plant is exposed to an equal amount of sunlight, so sunlight is the control variable.

Detailed explanation-2: -Water and light are considered independent because they can be changed, while gravity cannot be changed and is therefore not an independent variable.

Detailed explanation-3: -For example, if you open a faucet (the independent variable), the quantity of water flowing (dependent variable) changes in response–you observe that the water flow increases. The number of dependent variables in an experiment varies, but there is often more than one.

Detailed explanation-4: -Plant growth is affected by several factors such as seed variety, amount of water, soil type, amount of light, temperature, humidity, and other.