Question

Read the following steps to save electricity and energy. Classify them into four parts accordingly.(Any five) (5) (1)Turn off all unnecessary lights.(2) Use solar heater (3) Buy and use fuel efficient vehicles (4) Your gas stove flame should be blue.(5) Cover utensils while cooking food.(6) Use pressure cooker and microwave ovens as they save cooking time.(7) Save paper-Reuse paper. Print on both sides of the page.(8)Walk or ride a bicycle whenever possible (9) Use public transport when possible. At home, In the kitchen ,At the school, While travelling.​

Answer 1

Explanation:

Technology to utilise the forces of nature for doing work to supply human needs is as old as the first sailing ship. But attention swung away from renewable sources as the industrial revolution progressed on the basis of the concentrated energy locked up in fossil fuels. This was compounded by the increasing use of reticulated electricity based on fossil fuels and the importance of portable high-density energy sources for transport – the era of oil.