The document provides revision work and homework assignments related to environmental science topics. It includes quizzes on why Earth is called the Blue Planet, the four major elements of the environment, the definition of biodiversity, and two ways humans are disturbing the natural environment. It also includes quizzes on the definitions of weathering, humus, major soil types in India, residual soil, and denudation. Finally, it lists homework assignments to prepare for upcoming revision tests in geography, history, and civics.