Available Answers

1. 1.

   Fill in the blanks.

   1. An important property of light is that it travels in a _________________ line.
   2. Light cannot _________________  around objects.
   3. The two translucent objects are _________________ and _________________
   4. For the formation of shadow, we need _________________, _________________, and _________________.
   5. Shadows are longest in the _________________ and in the _________________.
2. 2.

   Fill in the blanks.

   1. The ____________ of Earth causes the formation of day and night.
   2. A solar eclipse can be of ____________ types.
   3. An eclipse occurs when the three celestial bodies are in a ____________ line.
   4. A total solar eclipse occurs when the ____________ is totally hidden by the ____________.
3. 3.

   Choose the correct option.

   1. Natural source of light include
      1. sun
      2. stars
      3. fires
      4. All of these
   2. Which of the following does not allow light to pass through them?
      1. Book
      2. Mirror
      3. Computer
      4. All of these
   3. Which of the following is transparent?
      1. glass
      2. bed
      3. copy
      4. None of these
   4. Light travels in a
      1. zigzag path
      2. straight line
      3. circular path
      4. curved line
   5. The colour of the shadows is
      1. red
      2. orange
      3. black
      4. white
4. 4.

   Match the following.

   1. Source of light	i. Transparent
   2. Translucent	ii. Shadow
   3. Clean water	iii. Fixed path of Earth around the sun
   4. Dark patch	iv. Candle
   5. Orbit	v. Tracing paper

5. 5.

   Define source of light. Name its two types with examples.

6. 6.

   Write an important property of light.