Page 110 - ScienceStd4

12. Sound energy is used in communication.

13. The handles of a pot and an iron are made of metal to

prevent heat transfer.
FOR ONLINE READING ONLY
14. Television produces sound energy only.

Section C: Match the items in Section A with items in Section
B to form the correct sentences.

15.

Section A Section B
(i) Shadow (a) Sun and moon

(ii) Firewood (b) Dark area that appears
after light is blocked by an
(iii) Straight line object

(iv) Two different (c) Produces light and heat

transparent media energy after combustion

(v) Reflection (d) Results from the vibrations
of various objects.
(vi) Image
(e) The way light rays travel
(vii) Sound
(f) The result of a picture
(viii) Sun or drawing appearing on
smooth, reflective surfaces
(ix) Echo
(g) Causes light to bend
(x) Guitar, bell and piano
(h) The main source of light
and heat energy

(i) The action of light rays
bouncing back after hitting
a reflective or smooth
surface

103

14/01/2025 18:38
SCIENCE AND TECHNOLOGY STD 4.indd 103
SCIENCE AND TECHNOLOGY STD 4.indd 103 14/01/2025 18:38