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Simple machines A simple machine is a mechanical device that changes the direction or magnitude of a force.

Skeletal system The human skeleton is the internal framework of the human body. It is composed of around 270 bones at birth – this total decreases to around 206 bones by adulthood after some bones get fused together.

Simple Machines A simple machine is a mechanical device that changes the direction or magnitude of a force.

Water cycle The water cycle, also known as the hydrologic cycle or the hydrological cycle, is a biogeochemical cycle that describes the continuous movement of water on, above and below the surface of the Earth

Types of energy Kinetic energy is motion of waves, electrons, atoms, molecules, substances, and objects. Potential energy is stored energy and the energy of position gravitational energy.

Animal habitats The area where a particular organism lives naturally is called its habitat. The five major habitats are – forests, grasslands, deserts, mountains and polar regions, and aquatic habitat.

Ecosystem a biological community of interacting organisms and their physical environment.

Types of energy Kinetic energy is motion––of waves, electrons, atoms, molecules, substances, and objects. Potential energy is stored energy and the energy of position––gravitational energy.

Parts of the body human body, the physical substance of the human organism, composed of living cells and extracellular materials and organized into tissues, organs, and systems.

Animals & plants habitats In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species.