Contents Our Universe Have you ever wondered what all is there in our universe? This Unit takes you on a tour of the Universe, giving information about the Milky Way Galaxy, Solar System, Stars, Planets and other celestial bodies. The various activities suggested in this lesson can make the learning process incredibly interesting! Our Earth Earth our planet. This Unit gives you an insight on how the earth moves. The concepts of rotation and revolution clearly explain why we have days and nights and the different seasons on Earth. You will also learn about how to locate a place on the globe using latitudes and longitudes. Maps This section explains the different components shown on a map so that map reading becomes easier for you. The components include scale, direction, symbols and index. Types of maps discussed in the lesson help you to differentiate between maps of different kinds. Realms of the Earth Earth consists of land, air and water. It is the only known planet in the universe where life exists. This unit gives a brief description of these major realms. A highlight of the unit is the sub-section that provides interesting facts on Asia, Africa, Americas, Australia, Europe and Antarctica. Major Landforms This unit gives a detailed account of the major landforms on Earth, namely, mountains, plains and plateaus. It also throws light on how different types of mountains are formed. The lesson is supplemented by examples from different parts of the globe. Next