1. THE 24-HOUR CLOCK What it is and when is it used?

2. WHAT IS THE 24- HOUR CLOCK? The 24-hour clock is a regular looking clock with 24-hours in it.

3. EXAMPLE:1

4. WHAT ARE THE DIFFERENCES THAT YOU SEE? 12-hour clock 24-hour clock

5. WHEN IS THE 24- HOUR CLOCK USED?

6. Trains, aero planes and ships often times travel for more than 12 hours and across different time zones. So to avoid the confusion with what time, they use the 24-hour clock. The army is a another entity that uses the 24-hour clock.

7. NOW TRY THESE Express the following in terms of 24-hour clock: a)2 p.m. b)8:30 p.m. c)3 minutes past midnight

8. Express the following 24-hour clock times in ordinary times: a) 05:00 hrs b) 19:30 hrs c) 00:20 hrs