How seismographs work

This explanation text for year 3 and year 4 describes in detail how scientists can measure the movement of the earth beneath you using a seismograph. When an earthquake strikes, the ground underneath the seismograph moves up and down, side to side, or both. Large seismographs use a series of tiny levers to magnify the tiny movements, allowing them to detect very small tremors.

This downloadable reading pack includes:

• An A3 reading spread for you to print.
• Reading comprehension question and answer sheets, differentiated using our magnifying glasses key (on the bottom right). One magnifying glass indicates easier and two means harder.