Time

RULES TO LEARN

60 seconds = 1 minute
60 minutes = 1 hour
24 hours = 1 day
7 days = 1 week
2 weeks = 1 fortnight ("fourteen nights")
365 days = 1 year
366 days = 1 leap year (every 4 years e.g. the years 2012, 2016)
52 weeks - 1 year
26 fortnights = 1 year
12 months = 1 year
10 years = 1 decade
100 years = 1 century
1000 years = 1 millennium
MNEMONIC - DAYS OF EACH MONTH

Thirty days have September
April, June and November.
All the rest have 31
Except February
That, when comes the time
In leap year, has twenty-nine.

Example - Converting Time Units

Converting large unit to small unit (Multiply)
10 minutes = 600 seconds
2 years = 104 weeks
3 weeks = 21 days
5 fortnights = 70 days
3 decades = 30 years

Converting small unit to large unit (Divide)
30 minutes = 30 ÷ 60 = 0.5 hour
45 minutes = 45 ÷ 60 = 0.75 hour
12 hours = 12 ÷ 24 = 0.5 day
13 weeks = 13 ÷ 52 = 0.25 year
30 years = 30 ÷ 100 = 0.3 century

Did You Know That...?

This first ever photograph was taken by Louis Daguerre, an artist and physicist, in Paris in 1838. Only 3 people can be seen in his photograph, but because Daguerre used Time Lapse Photography, there would have been many more people moving in and out of view over the 15 minutes that the photographic plate was exposed.

You can create your own time lapse photographs with an ordinary camera by lengthening the exposure time. Try to make a "ghost" photograph by asking a person to stay still in front of the camera for about five seconds and then slowly moving out of view.

Questions

Complete these time conversions.

Q1. 15 minutes = hour
Q2. 20 hours = minutes
Q3. 1 day = minutes
Q4. 72 hours = days
Q5. 3 fortnights = days