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Section A Section B
(j) Sound that is reflected
back after hitting a hard
surface
FOR ONLINE READING ONLY
(k) Sources of sound energy
(l) Hard objects, liquids, and
gases
Section D: Questions with short answers.
15. List any two objects that allow light to pass through.
16. Explain how a shadow is formed?
17. What type of energy is produced when you sing a song?
18. Explain the three main methods of heat transfer.
19. What form of energy does a hen provide as it incubates
its eggs?
20. What is the difference between the surfaces of objects
that reflect light and those that do not reflect light?
21. What happens to a light ray when it travels from one
transparent medium to another?
Vocabulary
Bright the extent to which light is emitted or reflected
from a surface
Candle lamp a lamp that uses a wick and oil to burn
Radiate emit energy in the form of waves
Reflect to bounce light off a smooth and shiny surface
Refract to bend light
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