Light & Sound — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. When light hits a mirror, it bounces off or reflects.
Smooth shiny surfaces send light back in a neat path, which we call reflecting.
2. A shiny surface reflects light the best.
Shiny smooth surfaces bounce almost all the light that hits them.
3. A dull surface reflects very little light.
Dull rough surfaces scatter light in many directions, so little light bounces back.
4. The moon looks bright at night because it reflects sunlight.
The moon makes no light of its own; it simply bounces sunlight back to Earth.
5. Calm water acts like a mirror and reflects the sky.
When water is still, its smooth surface can reflect light like a flat mirror.
6. Kitchen foil is very shiny and bounces light well.
Aluminum foil is a thin smooth metal, so it reflects most of the light.
7. You can see yourself because a mirror reflects your image.
Light bouncing off you hits the mirror and comes straight back to your eyes.
8. A rough brick wall reflects light in many directions.
Bumpy surfaces scatter light, so you see the wall but not a clear image.
9. We only see the moon because of light from the sun.
Sunlight travels to the moon and reflects back to our eyes as moonlight.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Flat mirror
→ Sharp clear reflection
Sharp clear reflection
Still pond water
→ Wavy sky reflection
Wavy sky reflection
Kitchen foil
→ Bright crinkled shine
Bright crinkled shine
Rough paper
→ Almost no bounce
Almost no bounce
Each surface bounces light differently based on how smooth or shiny it is.