Write the word TRUE if the statement is correct and write FALSE if the

statement is wrong. Write the answer on the space provided before the number.

______11. The Earth is rock and steady.

______12. Seismograph is an instrument used to detect and record earthquakes.

______13. Seismogram is a record written by a seismograph in response to ground

motions

______14. Primary waves travel only in solids.

______15. Seismic waves are used by scientists to find the rock structure beneath the sea floor that contains oil deposits.