Class 7 chapter 2 geography (give reasons)
Class 7 Chapter 1 (Geography) Inside the Earth Worksheet Give Reason: Q1. Why we cannot go to the Centre of the earth? Ans: 1. The centre of the earth is lying about 6000 km from the ocean floor. 2. It has extremely high temperature and pressure. 3. There is only molten magma at the earth’s centre. 4. Oxygen is absent from this region. 5. Such conditions do not permit the survival of any living organism. 6. Thus we cannot go to the centre of the earth. Q2. How sedimentary rocks are formed from sediments? Ans: When big rocks break down into small fragments (sediments), they are transported and deposited by the factors like water and wind. These sediments compress and harden over years to form layers and layers of rocks. These rocks are known as sedimentary rocks.