1. What is the direction of heat transfer?
A. from hot to cold
C. from cold to hot
B. from bottom to top
D. from side to side
2. How is heat transferred in solid materials?
A. through convection
C. through conduction
B. through radiation
D. through vacuum
3. What happens to a liquid when heated?
A. it remains the same
C. it increases in temperature
B. it increases in volume
D. it increases its water level
4. What may happen to a solid when it is continuously exposed to heat?
A. it may become heavier
C. it may expand
B. it may decrease in volume
D. it may melt
5. When heat is transferred in gases, it is called
A. convection
B. radiation
C. conduction
D. roasting
6. How do the vibrations of the particles behave when sounds travel through solids?
A. occurs fast
C. occurs moderately
B. occurs very slowly
D. cannot be determined
7. How do sounds travel through air?
A. Very fast
C. in jumping motion
B. very slowly
D. in random manner
8. In which medium can sound wave travel faster?
A. Solids
B. liquids
D. all of these
9. What affects the speed of sounds as it travels?
A. person receiving it
C. the origin of the sound
B. the nature of material
D. loudness of the sound
10. Which of the following statements about sounds is correct?
A. Sound cannot travel through solids.
B. Sounds travel faster in air than liquids.
C. Sounds travel faster in solids than air.
D. The travel of sounds is not affected by the medium through which it travels.
C. gases​