24 Hour Clock - PowerPoint PPT Presentation

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24 Hour Clock

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24 Hour Clock We are learning how to read the 24 hour clock There are 24 hours in a day! The first 12 hours of the day are from: Midnight Midday In 12 hour time ... – PowerPoint PPT presentation

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Title: 24 Hour Clock


1
24 Hour Clock
  • We are learning how to read the 24 hour clock

2
There are 24 hours in a day!
  • The first 12 hours of the day are from
  • Midnight Midday

3
In 12 hour time
  • We count from midnight to midday
  • Then we count from midday to midnight!

4
Count the hours in the day
5
In 24 hour time we count from...
  • 1 to 24!
  • 1,2,3,4,5,6,7,8,9,10,11,12,
  • 13,14,15,16,17,18,19,20,21,22,23,24!

6
We dont use AM or PM in 24 hour clock!
  • 1 am
  • 2am
  • 3am
  • 4am
  • 5am
  • 6am
  • 7am
  • 8am
  • 9am
  • 10am
  • 11am
  • 12 noon
  • 0100
  • 0200
  • 0300
  • 0400
  • 0500
  • 0600
  • 0700
  • 0800
  • 0900
  • 1000
  • 1100
  • 1200

7
For PM times we keep counting to 24!
  • 1pm
  • 2pm
  • 3pm
  • 4pm
  • 5pm
  • 6pm
  • 7pm
  • 8pm
  • 9pm
  • 10pm
  • 11pm
  • 12 midnight
  • 1300
  • 1400
  • 1500
  • 1600
  • 1700
  • 1800
  • 1900
  • 2000
  • 2100
  • 2200
  • 2300
  • 2400 / 0000

8
Look at Midnight!
  • 1200 midnight
  • 0000
  • Why???

9
Its a new day
  • Midnight is the very beginning of the new day.
  • We have counted a full 24 hours
  • The day is over so we start counting again from
    zero!
  • 1,2,3,4,5,6,7,8,9,10,11,12,
    13,14,15,16,17,18,19,20,21,22,23,24!

10
What about the minutes?
  • In 24 hour time the minutes dont change.
  • 1.15am 0115
  • 245am 0245
  • 624pm 1824
  • 830pm 2030
  • 1045am 1045
  • 1135pm 2335

11
Noon Midnight
  • Noon
  • 1200pm 1200
  • 1215pm 1215
  • 1230pm 1230
  • 1245pm 1245
  • 1250pm 1250
  • 1205pm 1205
  • 1210pm 1210
  • Midnight
  • 1200am 0000
  • 1215am 0015
  • 1230am 0030
  • 1245am 0045
  • 1250am 0050
  • 1205am 0005
  • 1210am 0010

12
Click on the link to return to our website
  • http//www.killeanps.com/projects.html
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