How alarm clocks work

This explanation text for year 5, year 6, P6 and P7, linking to the topic Forces, explains how alarm clocks work. Ever since the first mechanical alarm clock was invented by ancient Greek inventor Ctesibius more than 2,000 years ago, people have been woken up by machines. This texts explains how these noisy time-keeping devices work.

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.