How many layers does the earth have...? Mcqs

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How many layers does the earth have...?

(A) 1
(B) 2

(C) 3
(D) 4

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The chemical name of quartz is:...?

(A) Silicon Dioxide
(B) Stannous Oxide

(C) Aluminium Oxide
(D) None

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The earth’s atmosphere is divided into layers based on the vertical profile of __________...?

(A) Air pressure
(B) Air temperature

(C) Air density
(D) Wind speed

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Animals without backbone are called...?

(A) Vertebrates
(B) Invertebrates

(C) Both A and B
(D) None of these

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The ratio of output to input is called...?

(A) Energy
(B) Work

(C) Power
(D) Efficiency

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He was the first scientist to prove that Planets move around the sun...?

(A) Archimedes
(B) Galileo Galilei

(C) John Kepler
(D) None

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Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ...?

(A) Zeolites
(B) Sulphonides

(C) Lime
(D) Nitrates

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Which of the following are not deflected by electric and magnetic fields ...?

(A) Alpha rays
(B) Beta rays

(C) Gamma rays
(D) None of these

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Which substance expands the most; for the same rise in temperature...?

(A) Water
(B) Air

(C) Copper
(D) Class

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What is the molecular formula for Ammonia...?

(A) NH
(B) NH2

(C) NH3
(D) NH4

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