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Which of the following are true regarding the crust of the earth?
I. It is the outer thin layer with a total thickness of about 100 km
II. It forms around 0.5% of the earth's volume
III. The outer covering of the crust is of sedimentary material
IV. The lower layer of the crust consists of basaltic and ultra-basic rocks
The most abundant element in the earth 's crust is oxygen . The second most abundant element is the earth's crust is -
The element found most abundantly in the earth crust is:
The most abundantly found element in earth crust?
Which element is found in maximum quantity in the crust or crust of the topmost layer of the earth?
Consider the statement A, B, C on igneous rocks and choose the correct answer. Statement (A): Sedimentary rocks, when subjected to heat and pressure turn into igneous rocks. Statement (B): These rocks are found both on the earth's crust and deep inside the earth's crust. Statement (C): Granite and Basalt are examples of igneous rocks. 
Which mineral group is abundantly found in the earth’s crust?
The phases of the moon as we see from the Earth are due to changing relative positions of the sun, the earth and the moon. Which of the following statements is true. A. on a full moon day, the earth comes between the sun and the moon B. on a new moon day, the moon is in between the earth and the sun C. on a full moon day, the moon is in between the earth and the sun D. on a new moon day, the earth is between the sun and the moon? E. on a new moon day, the sun is between the moon and the earth
Which of the following statements is not true with regard to the crust of the Earth? (i) It is the outermost layer of the earth. (ii) It is brittle in nature. (iii)  The thickness of the crust varies under the oceanic and continental areas.
Broadly, there are three layers of the Earth, the crust, the mantle and the core. The crust forms what percentage of the volume of the earth?