1. Assertion (A): A clinical thermometer consists of a bulb.
Reason( R) :Bulb is made of iron.
Answer:………………
Answers
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Answer:
List out the similarities and dissimilarities between the laboratory thermometer and the clinical thermometer?
Answer:
Similarities between the laboratory thermometer and the clinical thermometer are as follows:-
Laboratory thermometer and the clinical thermometer thermometers consist of long narrow uniform glass tubes.
Laboratory thermometer and the clinical thermometer have a bulb at one end.
Laboratory thermometer and the clinical thermometer contain mercury in the bulb.
Laboratory thermometer and the clinical thermometer use Celsius scale on the glass tube.
Differences between the laboratory thermometer and the clinical thermometer:
A clinical thermometer reads temperature 35°C to 45°C while the range of laboratory thermometer is -10°C to 110°C.
The clinical thermometer has a kink near the bulb while there is no kink in the laboratory thermometer.
Due to kink, mercury does not fall down on its own in clinical thermometer.
Question 2:
Give two examples each of conductors and insulators of heat.
Answer:
Conductors: Copper, aluminium and iron.
Insulators: Wood, water and air.
Question 3:
Fill in the blanks:
(a) The hotness of an object is determined by its __________.
(b) Temperature of boiling water cannot be measured by a _____________ thermometer.
(c) Temperature is measured in degree ______________.
(d) No medium is required for transfer of heat by the process of __________.
(e) A cold steel spoon is dipped in a cup of hot milk. It transfers heat to its other end by the process of ______________.
(f) Clothes of ______________ colours absorb heat better than clothes of light colours.
Answer:
(a) The hotness of an object is determined by its temperature.
(b) Temperature of boiling water cannot be measured by a clinical thermometer.
(c) Temperature is measured in degree Celsius.
(d) No medium is required for transfer of heat by the process of radiation.
(e) A cold steel spoon is dipped in a cup of hot milk. It transfers heat to its other end by the process of conduction.
(f) Clothes of dark colours absorb heat better than clothes of light colours.
Question 4:
Match the following:
(i) Land breeze blows during (a) summer
(ii) Sea breeze blows during (b) winter
(iii) Dark coloured clothes are preferred during (c) day
(iv) Light coloured clothes are preferred during (d) night
Answer:
(i) Land breeze blows during (d) night
(ii) Sea breeze blows during (c) day
(iii) Dark coloured clothes are preferred during (b) winter
(iv) Light coloured clothes are preferred during (a) summer
Answer:
a clinical thermometer consists of a bulb call mercury