A thick layer of air that surrounds the earth is known as...? Mcqs

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A thick layer of air that surrounds the earth is known as...?

(A) Ozone
(B) Atmosphere

(C) Stratosphere
(D) Hydrosphere

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Degree of variation within or among the species exists on different regions of the earth called...?

(A) Adaptation
(B) Extinction

(C) Evolution
(D) Biodiversity

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Following are examples of convex mirrors except ____...?

(A) Rear-view mirror
(B) Dentist mirror

(C) Blind Corner mirror
(D) Security mirror

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Nebulae are made up of ________...?

(A) Oxygen (97%) and Nitrogen (3%)
(B) Hydrogen (97%) and Helium (3%)

(C) Carbon (50%) and Nitrogen (50%)
(D) Helium (97%) and Hydrogen (3%)

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Proton number is denoted by symbol __________ ...?

(A) M
(B) Z

(C) P
(D) A

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Force has _____...?

(A) Magnitude and Direction
(B) Velocity and Acceleration

(C) Mass and Volume
(D) Energy and Momentum

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In Astronomy, what are Pallas, Vesta and Davida...?

(A) Stars
(B) Comets

(C) Asteroids
(D) None of these

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At room temperature most of ionic compounds are ______...?

(A) Amorphous solids
(B) Crystalline solids

(C) Liquids
(D) Gases

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Which of the following is true of bile salts...?

(A) They are enzymes
(B) They are manufactured by the pancreas

(C) They emulsify fats in the duodenum
(D) They increase the efficiency of pepsin action

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The study of geographical areas, plants and animal distribution is called_________...?

(A) Cosmetology
(B) Chorology

(C) Osteology
(D) Mycology

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