question_answer

  Shalini makes a model of box type solar cooker. She uses a black translucent plastic sheet as lid over the box. The output of the cooker is found to be too low. Her teacher observes this activity of her and asks her for some modifications to enhance its efficiency. Shalini enquires about the reason for such modification and does the needful.                 Read the above passage and answer the following questions (a) Why does the solar cooker not function well? (b) What modifications does the teacher ask to make and why? (c) Discuss the values of Shalini and her teacher.

Answer:

                  (a) The following steps we should take to conserve energy (i) Use renewable sources of energy Population control (ii) Afforestation i.e., planting of trees (iv) Limited consumption of fossil fuels        (1) (b) We should encourage others to play their role as a responsible citizen in the conservation of energy resources.                (1) (c) TV and newspaper are two examples of different agencies.                                            (1) energy from various sources are consider to have been derived from the sun.                  (1)