Minerals and power resources ,geography chapter 3 / CBSC Class 8 NOTES

Minerals and power resources ,geography chapter 3 / CBSC Class 8 NOTES

Question 1- name any e three common minerals used by you everyday? 


Answer- the minerals used in in our daily life are -: Salts, iron, copper etc. 


Question 2- tu what is an ore ? Where are the the ores of metallic minerals generally located? 


Answer  – an ore is a row form of minerals are found in a a given rock. The ores of metallic minerals are are found in hard- rock under the contain minimum quantity of that mineral. So that it can be e interacted. 


Question 3- name two regions which in natural gas resources. 


Answer- the regions which are rich this Reserves of natural gas resource are 


1- russiya, uk, and Norway in Europe. 


2- jaisalmer, krishna Godavari besan and digboi reason in India. 




Question 4- which sources of energy would you suggest for rural areas? 


Answer- 
rural areas- 

1- biogas energy and solar energy for rural areas. 

 

(b) coastal areas. 
– hydel and tidal, wind energy for coastal areas. 

(c) arid areas 


– wind and solar energy for arid areas. 


Question 5- give five ways in in which you can save energy at home? 


Answer- five ways in which energy can be saved at home 


1- switching off lights, fans and other electrical items when not they are not in use. 


2- by seeing that electrical device are operating efficiently. 


3- using LED bulbs, tubelight, tV and computer monitor. 


4- cooking goods in in pressure cookers and keeping the lids of pens: Cooking. 


5- unplugging electrical device when not in use. 


Question 6- environment aspects must be carefully looked into before building huge dams? 


Answer- it is because:- 


1- dance create in balance in the earth equilibrium. 


2- deforestation leads to environmental pollution. 




3- people become displaced. It it require shifting causing lot of hard shapes. 


4- it traits of flood and earthquake. 


Question 7 difference between conventional and non conventional source of energy? 


Answer- 
conventional 


1- have been common 


2- are generally it enhavstible. 


3- are mostly polluting. 


4- example – coal, fire ,wood. 


Non-conventional 


1- are not conventionally used. 


2- are generally in Alhashtable. 


3- are mostly non-polluting. 


4- example  – solar energy, nuclear energy. 


Question 8- difference between biogas and natural gas? 


Answer- 
Biogas- 

1- formed using organic waste sach and dead plant and animal matter, animal dung and Kitchen waste. 


2- is a non conventional source of energy. 


3- if easily available 


Natural gas 


1- found along with petroleum deposits and get released when curd oil is is what to the surface. 


2- if a conventional source of energy. 


3- not easily available very few containers have sufficient to natural gas reserves of there own. 


4- is a cleaner fuel. 


5- used as domestic fuel as wall as industrial fuel. Biogas messenger 


Question 9- difference between ferrous and non-ferrous? 



Answer- 

ferrous 


1- a metallic minerals that contain iron. 


Example:- iron ore 


Non ferrous 




1- a metallic minerals that does not contain. Example gold ,silver. 


Question 10- what is the different between metallic and nonmetallic? 


Answer- 


Metallic 


1- are minerals containing metal in a form. 



2- they are hard substance that conduct heat and electricity. 

3- they have lustre. 


4- iron ore, bauxite,manganese are the example of metallic. 


Non metallic 


1- A minerals not containing metal. 


2- they are soft and cannot conduct heat and electricity. 


3- they do not have lustre. 


4- limestone, coal and petroleum are the example of non metallic. 


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