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MCQs 1: The minimum thickness of crust under the oceans is

8 km 2 km 5 km 10 km
Answer Explanation

MCQs 2: The inner core of the Earth is made up of

copper iron nickel-iron alloy platinum
Answer Explanation

MCQs 3: The division of cores of the Earth includes

inner core tectonic core outer core both a and c
Answer Explanation

MCQs 4: The theory which states that the plates of earth are continuously moving is classified as

The Trench Drift Theory The Sphere Drift Theory The Continental Drift Theory The Oceanic Drift Theory
Answer Explanation

MCQs 5: The outermost layer of the Earth is

asthenosphere crust trench ridge
Answer Explanation

MCQs 6: The layer below the crust of the Earth is

trench mantle core ridge
Answer Explanation

MCQs 7: The thickness of outer core of the Earth is about

2,250 km 1,250 km 1,500 km 1,870 km
Answer Explanation

MCQs 8: The distinct layers of Earth does not include

crust core mantle tectonic plates
Answer Explanation

MCQs 9: The thickness of crust under the continents is

85 km 40 km 65 km 72 km
Answer Explanation

MCQs 10: The outer core of the Earth is made up of

nickel-iron alloy platinum copper iron
Answer Explanation

MCQs 11: The thickness of outer core of the Earth is about

2,130 km 2,750 km 2,500 km 2,250 km
Answer Explanation

MCQs 12: The range of thickness of crust is

5 to 60 km 10 to 50 km 15 to 40 km 8 to 38 km
Answer Explanation

MCQs 13: The pieces in which Earth's crust is broken are classified as

ocean plates ridge trench plates
Answer Explanation

MCQs 14: The thickness of the mantle is about

3,900 km 3,000 km 2,900 km 2,400 km
Answer Explanation

MCQs 15: The plates that are made up of the older rocks are classified as

continental plate contraction plate convection plate oceanic plate
Answer Explanation

MCQs 16: The temperature at the core can be as high as

2,550°C 2,300°C 3,700°C 3,300°C
Answer Explanation

MCQs 17: The currents that are formed in the mantle of the Earth are classified as

convection currents continental currents oceanic currents drift currents
Answer Explanation

MCQs 18: The types of plates includes

convection plate oceanic plate continental plate both b and c
Answer Explanation

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