CLASS-IX Worksheet
Time: 10 minutes
Instructions :
 Temperature can be measured in two different scales - °C and Kelvin (K)
 The SI unit of temperature is Kelvin
 K =°C + 273
°C = K – 273
 Answer the following questions.
Q.1. Convert the following temperature to the celsius scale.
a. 470 K
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b. 300 K
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c. 298 K
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Q.2. Convert the following temperature to the Kelvin scale.
a. 25°C
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b. 373°C
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c. 273°C
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A sample of water was heated from 25°C to 30°C.
(a) What were the initial and final temperatures of water in Kelvin scale?
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(b) How much was the rise in temperature on Celsius scale?
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(c) How each was the rise in temperature on Kelvin scale?
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Assessment Parameters-
Assessment Area Value Points
Formula
Calculation
1 mark for formula for inter conversion of temperature on
Celcius and Kelvin scales (1 Mark for formula for calculation
of rise in temperature 1 mark for each calculation)
(1 x 8) 8 mark