Page No 243:
Question 3:
If you could use any source of energy for heating your food, which one would you use and why?
Page No 248:
Question 3:
How has the traditional use of wind and water energy been modified for our convenience?
Page No 253:
Question 2:
Hydrogen has been used as a rocket fuel. Would you consider it a cleaner fuel than CNG? Why or why not?
Page No 254:
Question 1:
A solar water heater cannot be used to get hot water on
(a) a sunny day (b) a cloudy day
(c) a hot day (d) a windy day
Page No 255:
Question 2:
Which of the following is not an example of a bio-mass energy source?
(a) wood | (b) gobar gas |
(c) nuclear energy | (d) coal |
Page No 255:
Question 3:
Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?
(a) Geothermal energy
(b) Wind energy
(c) Nuclear energy
(d) Bio-mass
Page No 255:
Question 6:
What are the limitations of extracting energy from −
(a) the wind? (b) waves? (c) tides?
Page No 255:
Question 7:
On what basis would you classify energy sources as
(a) renewable and non-renewable?
(b) exhaustible and inexhaustible?
Are the options given in (a) and (b) the same?
Page No 255:
Question 9:
What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?
Page No 255:
Question 10:
What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?
Page No 254:
Question 1:
A solar water heater cannot be used to get hot water on
