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This chapter shows the Earth as one interconnected system where land, water, air, ice and living things constantly interact. It explains how...

This chapter is about biodiversity, the huge variety of living organisms on Earth, and why it matters. It explains how and why...

This chapter explains how living organisms produce new individuals of their own kind. It covers asexual reproduction (vegetative propagation, budding and spore...

This chapter explains how sound is produced by vibrations and how it travels through a medium as longitudinal waves. It covers the...

This chapter covers the basic laws of chemical combination: the law of conservation of mass and the law of constant proportions. It...

This chapter traces how our idea of the atom developed, from Acharya Kanada's parmanu and Dalton's theory to the models of Thomson,...

This chapter explains work done by a constant force and when work is zero, positive or negative. It covers energy, its forms,...

This chapter explains what a force is and how it changes the state of rest or motion of an object. It covers...

This chapter explains what mixtures are and how they are classified into homogeneous and heterogeneous mixtures. It covers solutions, concentration and solubility,...