These notes provide a concise summary of the Class 10 chapter “Our Environment.” They outline the major components of the environment (living and non‑living elements), the concept of ecosystems and biodiversity, the causes and consequences of environmental degradation (deforestation, pollution, soil erosion, climate change), and the role of sustainable practices such as afforestation, waste management, and renewable energy in protecting the environment.

These notes give a compact overview of the Class 10 Science chapter “Control and Coordination.” They cover the basic concepts of the nervous system and hormones, the structure and function of neurons, the role of the brain and spinal cord, the endocrine glands and their major hormones, how the two systems interact to regulate body activities, and the practical examples of reflex actions, feedback mechanisms and disorders such as diabetes and Parkinson’s disease.