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Question 1

Name any three common minerals used by you every day.

Gold, salt and copper are common minerals used by people every day.
Question 2

What is an ore? Where are the ores of metallic minerals generally located?

Solution :
Rocks from which minerals are mined are known as ores. Generally, metallic minerals are found in igneous and metamorphic rock formations that form large plateaus.
Question 3

Name two regions rich in natural gas resources.

Solution : 
Russia and Netherlands are two regions rich in natural gas resources.
Question 4

Which sources of energy would you suggest for (a) rural areas (b) coastal areas (c) Arid Regions?

Solution :
a) Rural Areas: Fire wood; coal solar energy and biogas can be used in rural areas.
b) Coastal Areas: Petroleum; tidal power and wind power can be used in coastal areas.
c) Arid Areas: Solar energy and geothermal power will be best suited for arid regions.
Question 5

Give five ways in which you can save energy at home.

Solution :
  •   We can switch off the lights and fans when not needed.
  •   Close the taps properly so that they do not drip.
  •   Close the vessel while cooking to reduce cooking time.
  •   Walk or use a bicycle to travel short distances.
  •   Use the staircase instead of the lift if you can.

Question 6

Give Reason for Environmental aspects must be carefully looked into before building huge dams.

Solution :
When dams are built large areas surrounding the dam are submerged in water. This could lead to destruction of natural vegetation, agricultural land or even displace settlements. So, one must look into all these aspects before building a dam.
Question 7

Give reason for Most industries are concentrated around coal mines.

Solution :
Coal is the common source of energy for most industries. So industries are concentrated around coal mines to reduce transportation costs.
Question 8

Give reason for Petroleum is referred to as "black gold".

Solution :
Petroleum is a thick black liquid. Petroleum and its derivatives are called Black Gold as they are very valuable.
Question 9

Quarrying can become a major environmental concern.

Solution :
Quarrying destroys the ecosystem around ii by ruining habitats for flora and fauna. . When they are near residential areas near quarries they create a noise hazard because of blasts and heavy machinery. They also create air pollution, most notably dust.
Question 10

Distinguish between Conventional and non conventional sources of energy

Solution :
Conventional sources of energy are those which have been in common use for a long time; example coal, petroleum and Hydel power.
Non-conventional sources are much sort after forms of energy in these modern times. They use renewable energy sources like wind, tide and organic waste.
Question 11

Distinguish between Biogas and natural gas

Solution :
Biogas is got from organic waste while natural gas is extracted along with petroleum from deep under the earth.
Question 12

Distinguish between Ferrous and nonferrous minerals

Solution :
Ferrous minerals contain iron while non-ferrous minerals do not contain iron.
Question 13

Distinguish between Metallic and non-metallic minerals

Solution :
Metallic minerals contain metals in their chemical composition while non- metallic minerals do not have extractable metals in their chemical composition.
Question 14

Pick the Correct Asnwer

(a) Which one of the following is NOT a characteristic of minerals?
(i) They are created by natural processes
(ii) They have a definite chemical composition
(iii) They are inexhaustible
(iv) Their distribution is uneven

(b) Which one of the following is NOT a producer of mica?
(i) Jharkhand           (ii) Karnataka        (iii)  Rajasthan (iv)  Andhra Pradesh

(c) Which one of the following is a leading producer of copper in the world?
(i) Bolivia                  (ii)  Ghana              (iii) Chile             (iv)  Zimbabwe

(d) Which one of the following practices will NOT conserve LPG in your kitchen?
(i) Soaking the dal for some time before cooking it
(ii) Cooking food in a pressure cooker
(iii) Keeping the vegetables chopped before lighting the gas for cooking
(iv) Cooking food in an open pan kept on low flame


(a) (iii) They are inexhaustible

(b) (ii) Karnataka
(c) (iii) Chile
(d) (iv) Cooking food in an open pan kept on low flame

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