1. CBSE Class 12th Secondary Human Activities

    January 25th, 2021 by

    We discussed economic activities and its first type- the primary activities, earlier. The activity which generates revenue is an economic activity, if the activity involves human interaction with the elements of the environment (animal or plant), it falls under the category of primary activity.  Secondary activity, on the other hand, adds value to the natural […]

  2. CBSE Class 11th The Origin and the Evolution of the Earth

    January 24th, 2021 by

    When you look at the sky, we see a lot of mystery. The stars at night, clouds in the morning and astronomical features like the comets, the falling stars, etc. The Earth in itself is a wonder. Let’s see how the universe in which we live came into existence. Early Theories of Origin of the […]

  3. CBSE Class 12th Primary Human Activities

    January 22nd, 2021 by

    To live in a society, human beings, apart from basic necessities of cloth, food and shelter also need to generate income. This enables the humans to live in a civilized manner instead of having to hunt and scavenge for food everyday like the other species. Certain activities which ensure income generation are termed as Economic […]

  4. CBSE Class 11th Solar Radiation, Heat Balance and Temperature

    January 19th, 2021 by

    Life on earth is possible due to multiple reasons. One of them being the feature of the earth to radiate back all the heat energy it receives from the sun due to which it neither cools down nor warms up. Let’s see then, how the earth maintains heat enough to sustain life:  Solar Radiation Incoming […]

  5. CBSE Class 11th Water in the Atmosphere

    January 15th, 2021 by

    The atmosphere is a blanket around the Earth which is composed of gases, water vapour and dust particles. Out of these elements, water is present in all three forms – solid, liquid and gas. It keeps converting among these forms due to the processes of condensation and evaporation. Let’s have a look at these processes […]

  6. CBSE Class 11th Landforms – Formation and Evolution

    January 10th, 2021 by

    When we look around us we see how variegated the face of the earth is. There are high mountains, rocks, canyons, sandy beaches, majestic oceans, and even hollows and caves on the Earth’s surface. Let’s see how these wonders of the earth came to be? What are landforms? Landforms are any man-made creation which is […]