Question

SCIENCE 7
Long An
G. Ansy
3. A shiny surface absorbs most of the heat.
4. Electric cables sag in summer.
5. A clinical thermometer has constriction above the bulb.
C. Underline the correct answers.
1. On heating, maximum expansion is observed in
a. solids
b. liquids
C. gases
2. A liquid gets heated up by
a. conduction b. convection c. radiation
Heat transfers from
a. a body at higher temperature to a body at lower temperature
b. a body at lower temperature to a body at higher temperature
c. a body at one temperature to another body at same temperature
In convection mode of heat, the particles get heated up and
a. rise up
b. move down c. move sideways
5. On absorbing heat the particles of matter
a. become bigger b. become smaller c. move faster
de vivi
H. H
d. move slower
Very Short-Answer Questions
​

Answer 1

Answer:

shiny objects absorb more heat due to the phenomenon of uniform heating. in case of regular arrangement of molecules every molecule is in perfect sync with the heat absorbed and heat is transferred equally in all direction unlike the indifferent surface it's similar phenomenon to that of the reflection from the plane and rough surface