I) MCQS:-
1) The process of separating minerals from their ores by heating is called
____________
a)mining b)drilling c)quarrying d)smelting
2) The extraction of minerals from the earth is called __________
a)plantation b)mining c)transportation d)ploughing.
3) Name the best quality of iron ore.
a)magnetite b)limonite c)haematite d)siderite
4) From which ore is Aluminium extracted?
a)bauxite b)gold c)copper d)tin
5) Conventional sources of energy are ______________
a)inexhaustible b)exhaustible c)fossil fuels d)none of these
II) ONE WORD QUESTIONS-
1) How is Biogas extracted?
Ans.
2) Give two uses of Copper.
Ans.
3) List out the different uses of Natural gas?
Ans.
4) How is Tidal energy extracted?
Ans.
5) How is Geothermal energy extracted?
Ans.
III) MATCH THE FOLLOWING:-
1)Bauxite a)Malaysia
2)Petroleum b)Metallic
3)Haematite c)Non-metallic
4)Mica d)Fossil-fuel
5)Gold e)Aluminium
6)Tin f)Iron-ore
`IV) ASSERTION and REASONING :-
Assertion:
1)Geothermal energy is generated from the heat energy that is released
From inside the earth through hot springs.
Reason:It is not a clean and eco friendly source of energy but costly to transport as
plants are located far away from cities
a)Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true.
.2)Assertion:-Solar energy is the most abundant ,non-polluting and inexhaustible
source of energy it has a huge potential especially in tropical countries.
Reason:-It is used for many purposes such as cooking,heating water, and
generating electricity.
a)Both A and R are true and R is the correct explanation of A
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true.
V) ANSWER THE FOLLOWING QUESTIONS
1. Write about solar energy.
2. Write any five advantages of this source of energy.
Answers
Answer:
1.D 2.B 3.C 4.A 5.C 6
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1.biogas extracted from natural materials like Vegetablewaste, cow dung etc.
2.copper is used in electric motor and it's also used in construction
3.natural gas is used in cooking ( Heatenergy), it is used in electric generation.
4Tidal energy is produced through the use of tidal energy generators. These large underwater turbines are placed in areas with high tidal movements, and are designed to capture the kinetic motion of the ebbing and surging of ocean tides in order to produce electricity.
5.Magma heats nearby rocks and underground aquifers. Hot water can be released through geysers, hot springs, steam vents, underwater hydrothermal vents, and mud pots. These are all sources of geothermal energy. Their heat can be captured and used directly for heat, or their steam can be used to generate electricity.
Answer:
the process of separating minerals from their ores by heating is called