&
1. What do you understand by the term mass? State
2. Name two multiples and two submultiples of SI
3. What kind of balance is used for finding the mass
of (a) gold ornament (6) vegetables?
4. What do you understand by the term 'time'? State
STUDY QUESTIONS
its SI unit.
unit of mass.
9.
its Sl unit.
5. (a) How many centuries make one millennium?
(b) How many decades make one millennium?
(C) How many years make one millennium?
6. (a) What do you understand by the term mean
solar day?
(b) How many hours are there in one mean solar
10. O
day?
(c) How many minutes are there in one mean
solar day?
(d) How many seconds are there in one mean
solar day?
7. Define the following terms:
(a) Simple pendulum (b) Oscillation
(c) Length of pendulum (d) Time period
Answers
Answer:
Explanation:
NCERT Solutions for Class 7 Science Chapter 4 Heat
September 25, 2019 by Sastry CBSE
NCERT Solutions for Class 7 Science Chapter 4 Heat
Topics and Sub Topics in Class 7 Science Chapter 4 Heat:
Section Name Topic Name
4 Heat
4.1 Hot and Cold
4.2 Measuring Temperature
4.3 Laboratory Thermometer
4.4 Transfer of Heat
4.5 Kinds of Clothes we Wear in Summer and Winter
Q.1. State similarities and differences between the laboratory thermometer and the clinical thermometer.
Ans. Similarities:
(i) Both thermometers consist of long narrow uniform glass tubes.
(ii) Both have a bulb at one end.
(iii) Both contain mercury in bulb.
(iv) Both use Celsius scale on the glass tube.
Differences:
(i) A clinical thermometer reads temperature 35°C to 45°C while the range of laboratory thermometer is -10°C to 110°C.
(ii) 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.
Q.2. Give two examples each of conductors and insulators of heat.
Answer:
For 5 points this much big question is ....... incorrect