Available Answers

1. 1.

   Write T for true and F for false statements.

   1. During the day, bulbs and torches are used as sources of light.
   2. The Sun provides light and heat to humans, plants and animals.
   3. The objects that give off light are known as luminous objects.
   4. Beds, plates, chairs, bags and toys emit light.
   5. Candles and bulbs are natural sources of light.
2. 2.

   Write a difference between luminous and non-luminous objects.

3. 3.

   Classify the following objects as opaque, translucent or transparent materials.

   

4. 4.

   Differentiate between opaque, translucent and transparent objects.

5. 5.

   What is a shadow? Write down the conditions required for shadow formation.

6. 6.

   How do shadows formed by the Sun change through the day? Why?