Cause and effect is a relationship where one event, the cause, leads to another event, the effect. For example, if it rains, the ground becomes wet. In this case, the rain is the cause, and the wet ground is the effect. Understanding this relationship helps us make sense of how different events influence one another in our daily lives. In science, cause and effect is crucial for experiments. When researchers change one variable, they observe the outcome to see how it affects the results. For instance, if a scientist increases the amount of sunlight a plant receives, they may find that the plant grows taller. Here, the increased sunlight is the cause, and the taller plant is the effect.