Chapter 15 Time And Temperature Worksheet Page 5
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TIME AND TEMPERATURE (Chapter 15)
B
UNITS OF TIME
We are all familiar with the concept of time and the measurement
It is common to
of time in years, months, weeks, days, hours, minutes, and seconds.
write h for hours,
min for minutes,
RELATIONSHIP BETWEEN TIME UNITS
s for seconds.
1 year
1 week = 7 days
= 12 months
1 day = 24 hours
= 52 weeks (approximately)
1 hour = 60 minutes
= 365 days (or 366 in a leap year)
1 minute = 60 seconds
The number of days in the month varies:
31
31
30
January
May
September
28 (29 in a leap year)
30
31
February
June
October
31
31
30
March
July
November
30
31
31
April
August
December
A leap year occurs if the year is divisible by 4 but not by 100, except if the year is divisible
by 400. For example: 1996 was a leap year
2000 was a leap year
2100 will not be a leap year.
Long times
1 decade = 10 years
1 century = 100 years
1 millennium = 1000 years
Short times
The times for
computers to
1
1 millisecond =
perform operations
of a second
1000
are measured in
1
1 microsecond =
of a second
milliseconds.
1 000 000
1
1 nanosecond =
of a second
1 000 000 000
Example 2
Self Tutor
Convert 3 days, 9 hours and 42 minutes to minutes.
3 days
9 hours
3 days
4320
= 3 £ 24 hours
= 9 £ 60 min
9 hours
540
= 3 £ 24 £ 60 min
= 540 min
+ 42 mins
42
= 4320 min
4902 min
Total
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