Available Answers

1. 1.

   Tick (√) the correct option:

   1. Excretory wastes of maximum farm animals _______________ in nutrients.
      1. rich
      2. poor
      3. thick
      4. thin
   2. Which of the following is translatory motion?
      1. Curvilinear motion
      2. Rectilinear motion
      3. Random motion
      4. All of these
   3. SIS stands for standard _______________ system.
      1. International
      2. Indian
      3. Internal
      4. Incorporating
   4. Which of the following produces electricity when sunlight falls on it?
      1. Button cell
      2. Solar cell
      3. Battery
      4. None of these
   5. Which of the following material is non-magnetic in nature?
      1. Gold
      2. Iron
      3. Nickel
      4. Cobalt
   6. Precipitation may fall as _______________.
      1. snow
      2. rain
      3. hail
      4. all of these
   7. The colour of a shadow is
      1. always black
      2. always white
      3. same as that of the object
      4. none of these
   8. Around _______________ earth is covered with water.
      1. 40%
      2. 50%
      3. 60%
      4. 70%
2. 2.

   Fill in the blanks:

   1. ________________ is a process of recycling of biodegradable wastes.
   2. A moving object keeps changing its ________________.
   3. ________________ gas helps in burning.
   4. The colour of the shadow is always ________________.
   5. About ________________ of the earth is covered by water bodies.
   6. ________________ is a natural magnet.
   7. Ice is the ________________ state of water.
   8. The tiny wire inside a bulb is called ________________.
3. 3.

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

   1. A waste has no value.
   2. Air is a mixture of two gases.
   3. Earth has a limited amount of water.
   4. The penumbra is a region of partial darkness.
   5. Most of the water is found in the form of ice.
   6. Fe₂O₃ is the formula of magnetite.
   7. A child on a swing has only circular motion.
   8. A footstep can be used as a standard unit of length.
4. 4.

   Match the following:

   Column I	Column II
   1. Magnetism	а. Strongly attracted by magnets
   2. Magnetic material	b. Gold
   3. Magnetic substances	c. A device to determine directions
   4. Non-magnetic substance	d. Iron
   5. Magnetic compass	e. Property of magnetic attraction

    

5. 5.

   What is the term used to describe the reuse of waste products?
6. 6.

   Name two sources of groundwater.