1) Which of the following is not a souce of natural light? a) Flashlight b) Fire c) Jelly fish 2) Which of the following is not a man-made light? a) Light bulb b) Lamp c) Lightening 3) What is our main source of light energy? a) Stars b) Fire c) Sun 4) Which is not transparent? a) Book b) Water bottle c) Air 5) Which is not opaque? a) Book b) Mily glass c) Jacket 6) What is the meaning of opaque? a) Light passes through b) No light passes  c) Little light passes through 7) What is the meaning of transparent? a) No light passes  b) Light passes through c) Little light passes through 8) What is the meaning of translucent? a) No light passes through b) Light passes through c) Little light passes through 9) What happen if there is no lights? a) We can still see everything b) We can see with our eyes c) It will very dark 10) Light is an energy that we can?? a) Feel b) See c) Touch 11) You can see throught water because? a) it's opaque b) it's transparent c) it's translucent 12) Artificial sources of light are made by? a) people b) the sun c) the moon 13) All the following are sources of lights except a) the sun b) fire c) a light bulb 14) All the following are man-made except a) sun b) lamp c) torch 15) All the following are opaque except a) cup b) brick c) milky bottle

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