Film explaining why plants need to move and why they move as they do. It opens with an explanation of the time-lapse technique in cinematography which is used as an aid to the understanding of plant movements. These movements are contrasted with those of animals, and the ways in which they enable the plant to obtain its requirements are explained. A series of experiments illustrate the movements of plants in response to light, gravity, water and touch.
Intended for senior middle and secondary schools.