Available Answers

1. 1.

   Multiple Choice Questions (MCQs). Tick (√) the right option:

   1. Energy obtained from human waste is
      1. Biogas 
      2. Hydro energy
      3. Solar energy
      4. None of these
   2. Bottle opener is an example of 
      1. A third class lever
      2. A second class lever
      3. An inclined plane
      4. A first class lever
   3. __________ is all around us.
      1. Air 
      2. Plant
      3. Water
      4. All the above
   4. Renewable sources are also called __________ sources.
      1. Easy
      2. Alternative
      3. Useful
      4. None of these 
   5. Energy generating by moving water is 
      1. Solar
      2. Hydro electricity
      3. Wind
      4. None of these
2. 2.

   Write 'T' for true or 'F' for false:

   1. Sun is the main source of energy.
   2. machines make our work easier.
   3. A doorknob and the wind glass are examples of fixed pulley.
   4. Soil formation is influenced by organisms.
3. 3.

   Fill in the blanks:

   1. __________ provides shelters for animals.
   2. Living being get energy from __________.
   3. Water is the most important __________ on earth.
   4. Movable pulleys are used to lift __________.
4. 4.

   What is soil?
5. 5.

   What is energy?