Page 157 - Active Science 5 Ebook and Activity

We can manage our daily work effectively, if we plan time according to the activities
to be performed. A day consists of 24 equal durations and each duration is called an

hour. Minutes and seconds are used for measuring smaller durations, and weeks,
months and years are used to measure longer durations. Second is the standard unit
of measurement of time.

Conversion between different units of measurement of time is as follows.

60 seconds = 1 minute
60 minutes = 1 hour

24 hours = 1day
7 days = 1 week
12 months = 1 year

Watches, wall clocks and stop watches are commonly used devices for the measurement
of time.
Factual Study

In a year, there are 365.25 days. Since it is not
easy to denote 0.25 days every year, therefore, it
has been decided all over the world to add one day
to the month of February every fourth year. This
year is called as leap year. Thus, every leap year
has 366 days while a normal year has 365 days.

Wrist Watch Stop Watch Wall Clock

Measurement of Temperature

Temperature is defined as the degree of hotness or coldness of an object. Degree
Celsius (˚C) and Degree Fahrenheit (˚F) are units by which temperature is commonly

represented. Kelvin (K) is the standard unit of measurement.

You can convert temperature from one unit to another with the help of following relationship.
C/5 = F-32/9

F = 9C/5 +32
Clinical Thermometer Let’s Pronounce Together

Thermometer is the commonly used device to measure
temperature. In hospitals, clinical thermometer measurement cubit
is used for the measurement of body temperature. In handspan duration

science laboratory, a laboratory thermometer is used punctuality Celsius
to measure the temperature during various experiments. temperature Fahrenheit

experiment

Laboratory Thermometer

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