Available Answers

1. 1.

   Choose the correct option.

   1. An example of an artificial source of light is
      1. firefly
      2. sun
      3. candle
      4. A star
   2. Which of these is a translucent material?
      1. mud
      2. cement
      3. smoked glass
      4. wood
   3. A pinhole camera produces a/an
      1. inverted image
      2. electricity
      3. object
      4. upright image
   4. Which of the following is a good conductor of electricity?
      1. Wood
      2. Copper
      3. Rubber
      4. Pure water
   S A M P L E

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   Answer:

   S A M P L E

   1. (c) candle
   2. (c) smoked glass
   3. (a) inverted image
   4. (b) Copper
2. 2.

   Write T for the true statement and F for the false one. Correct the false statement(s).

   1. Materials that transmit all the light falling on them are called opaque materials.
   2. For a shadow to form, we need only a source of light, a transparent object, and a screen.
   3. A pinhole camera forms an inverted image.
   4. Secondary cells can be recharged once they are drained.
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   Answer:

   S A M P L E

   1. F Materials that transmit all the light falling on them are ...
   2. F For a shadow to form, we need a source of light, an opaque object...
   3. ...
   4. ...
3. 3.

   Write one word for the following.

   1. An area of darkness formed by an opaque object by blocking light.
   2. The type of reflection from a rough surface,
   3. A circuit that has an unbroken path through which an electric current can flow.
   4. A type of material that allows an electric current to pass through.
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   Answer:

   S A M P L E

   1. Shadow
   2. Diffused
   3. Closed
   4. Conductor
4. 4.

   What is lateral inversion?

5. 5.

   What is diffused reflection?

6. 6.

   Name the parts of a dry cell.