Last seen: Jun 14, 2021
From figure, the coordinates of points A, B, C and D are (3, 4), (6, 7), (9, 4) and (6,1). Find distance between points using distance formula, we g...
Let the points (5, -2), (6, 4), and (7, -2) are representing the vertices A, B, and C respectively. AB = = = BC = = = CA = = ...
Consider, A = (1, 5) B = (2, 3) and C = (-2, -11) Find the distance between points; say AB, BC and CA AB = = = = BC = = = = ...
Minerals are found in different types of rocks. Metallic minerals are usually found in igneous and metamorphic rocks that form large plateaus. Exam...
Mining, drilling, and quarrying are methods of extraction. Mining is a process of extraction of taking out minerals from rocks under the earth’s su...
Biogas is a renewable source of energy whereas the amount of natural gas is limited.
Kalpakkam, Tarapur, Ranapratap Sagar, Narora, and Kaiga are the nuclear power stations in India.
Bhakra Nangal, Gandhi Sagar, Nagaijunasagar, and Damodar Valley Projects are important hydel power stations in India.
Norway was the first country to develop hydroelectricity.
Natural gas is a fossil fuel obtained with petroleum deposits in oil fields.
Petroleum and its derivatives are black in colour but as valuable as gold, so we refer to it as “black gold”.
Coal is called “buried sunshine” because it is found buried under the earth, and is as important a source of energy as sunshine.
Minerals take thousands of years to form. The rate of formation is much smaller than the rate of consumption. So we classify them as non-renewable.
Silicon is important in the computer industry. It is obtained from quartz.
India has vast deposits of high-grade iron ore, and it is also a leading producer of salt.
Two areas in Western Australia having large deposits of gold are Kalgoorlie and Coolgardie.
China, Malaysia, and Indonesia are leading tin producers in Asia.
Quarrying is a process of extraction in which minerals lying near the surface are simply dugout.
A rock is an aggregate of one or more minerals. An ore is a rock from which minerals are mined.
(i) - (d) (ii) - (a) (iii) - (b) (iv) - (c) (v) - (e).