Coal is an example of ___________.
Tick the correct answer.
(i) The rock which is made up of molten magma is
(a) Igneous
(b) Sedimentary
(c) Metamorphic
(ii) The innermost layer of the Earth is
(a) Crust
(b) Core
(c) Mantle
(iii) Gold, petroleum and coal are examples of
(a) Rocks
(b) Minerals
(c) Fossils
(iv) Rocks which contain fossils are
(a) Sedimentary rocks
(b) Metamorphic rocks
(c) Igneous rocks
(v) The thinnest layer of the Earth is
(b) Mantle
(c) Core
Consider the following statements 1. Though the continental crust has greater thickness it is less dense than the oceanic crust. 2. Deccan plateau is made up of only granite rocks. 3. Granite rock is an example of extrusive igneous rocks. 4. Limestone, sandstone and coal are examples of sedimentary rocks. Which of the above statement(s) is/are correct?
Which of the following is not an example of a bio-mass energy source?
(a) wood
(b) gobar gas
(c) nuclear energy
(d) coal