Question: Distinguish between absolute humidity and relative humidity. In what units are they expressed? Answer: Absolute Humidity: This is the amount of water vapour present in a unit volume of air, and is expressed in kilograms per cubic meter. Relative Humidity: This is a measure of how dry or moist …
Read More »NCERT 7th Class (CBSE) Social Science: Elements of Weather and Climate
Question: Distinguish between Weather and climate. Answer: Weather and Climate: Question: Distinguish between Heat and Temperature, Convection and Advection and Latitude and Altitude Answer: Heat and Temperature Convection and Advection Latitude and Altitude
Read More »NCERT Class 7th (CBSE) Social Science: The Hydrosphere
Question: Describe the general distribution of salinity in oceans. Answer: The distribution of salinity in oceans is as follows: Ocean water is saline due to the presence of a large amount of dissolved salts, mostly sodium chloride or common salt. The amount of salinity varies from one part of the …
Read More »NCERT 7th Class (CBSE) Social Science: The Changing Face of the Earth
Question: Define “Lithospheric Plates”. Answer: According to the theory, the lithosphere is broken up into number of pieces called tectonic or lithospheric plates. It consists of crust and outer parts of upper mantle. There are six major and 20 minor plates, all of which floats independently. Question: Distinguish between endogenetic and …
Read More »NCERT 7th Class (CBSE) Social Science: The Interior of the Earth
Question: Distinguish between rocks and minerals. Answer: Difference is as follows: Question: Distinguish between intrusive and extrusive rocks. Answer: Difference is as follows: Question: Name the main types of rocks with three examples of each. Answer: There are three types of rocks: Igneous rocks: Granite, Dolerite, Basalt. Metamorphic rocks: Marble, Slate, Quartzite. Sedimentary rocks: Sandstone, …
Read More »NCERT 7th Class (CBSE) Social Science: Our Environment
Question: Explain the following terms- Environment, Lithosphere, Biosphere, Ecosystem, Pollution and Urbanization. Answer: Definitions are as follows: Environment – It refers to all external conditions in which an organism lives. It comes from the french word ‘environ’ which means to surround. It is used to describe everything, such as places, …
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