Available Answers

1. 1.

   Answer correctly

   1. Which of the following is a non-conventional source of energy?
      1. Water
      2. Wind
      3. Firewood
      4. Natural gas
   2. Renewable sources of energy are _____________.
      1. exhaustible
      2. found in limited areas
      3. non-pollutant
      4. non-recyclable
   3. Coal, petroleum and natural gas are called _____________.
   4. The conventional sources of power are sustainable in nature. (True/False)
2. 2.

   Read the passage carefully and answer the questions given below.

   Geothermal energy is a non-conventional source of energy which is generated by using the heat of the Earth. It is the energy derived from hot springs, geysers and hot rocks in the interior of the Earth's surface. It is commonly used in Iceland, New Zealand, Italy, USA, Japan and Russia. Two experimental projects have been set up in India to harness geothermal energy. One is in the Parvati valley near Manikaran in Himachal Pradesh and the other is in the Puga Valley, Ladakh.

   1. Name two countries where geothermal energy is commonly used.
   2. Why do you think India has a good scope of harnessing geothermal energy?
3. 3.

   Answer correctly.

   1. Which of the following countries is well known for its windmills?
      1. Italy
      2. Netherlands
      3. Brazil
      4. Egypt
   2. The ___________ multipurpose project is in the state of Odisha.
      1. Damodar Valley
      2. Bhakra Nangal
      3. Nagarjuna Sagar
      4. Hirakud
   3. Solar cells, based on ___________ technology, are used to convert Sun's energy to electricity.
   4. The Sardar Sarovar multipurpose project is built across the ___________ river.
   5. Solar energy is effective in all types of weather conditions. (True/False)
   6. Clusters of windmills are called wind farms. (True/False)
4. 4.

   Answer correctly.

   1. ________________ is the best variety of coal.
      1. Anthracite
      2. Bituminous
      3. Peat
      4. Lignite
   2. In India ________________ is the largest producer of petroleum.
      1. Gujarat
      2. Maharashtra
      3. Assam
      4. Andhra Pradesh
   3. Electricity generated from coal is called ________________.
   4. Petroleum releases ________________ gases on burning.
   5. Coal is an igneous rock. (True/False)
   6. Fossil fuel reserves have been dwindling all over the world. (True/False)
5. 5.

   Picture study

   Observe the picture and answer the questions.

   1. What is shown in the picture?
   2. How is it useful?
   3. In which areas is it mostly located? Why?

   

6. 6.

   Distinguish between conventional and non-conventional sources of power.