State whether the following statements are True or False.
Q.16 Sedimentary rocks are also known as Primary rocks.
Q.17 The intensity of an earthquake is measured with the help of Hygrometer.
Q.18 A volcano likely to be active in the future is extinct volcano.
Q.19 Campaigning must stop 48 hours before the day of the elections.
Q.20 Speaker is the presiding officer of the Vidhan Parishad.
Answers
Answer:
Primary rock is an early term in geology that refers to crystalline rock formed first in geologic time,[1] containing no organic remains, such as granite, gneiss and schist as well as igneous and magmatic formations from all ages. Webster's Revised Unabridged Dictionary published in 1913[2] provides the following term as used in geology:
Primary rocks (geol.) a term early used for rocks supposed to have been first formed, being crystalline and containing no organic remains, as granite, gneiss, etc.; – called also primitive rocks. The terms Secondary, Tertiary, and Quaternary rocks have also been used in like manner, but of these the last two only are now in use.
— Webster's Revised Unabridged Dictionary - 1913
Ninety years later the McGraw-Hill Dictionary of Scientific & Technical Terms published in 2003[3] places the term in the geologic field of petrology:
Primary rocks [′prī‚mer·ē ′räks] (petrology) Rocks whose constituents are newly formed particles that have never been constituents of previously formed rocks and that are not the products of alteration or replacement, such as limestones formed by precipitation from solution.
— McGraw-Hill Doctionary of Scientific & Technical Terms - 2003
Answer:
Q16- FALSE
Q17- TRUE
Q18- TRUE
Q19- FALSE
Q20- TRUE