What Is Light
Name one natural light source.
Sun, firefly, jelly fish, lightning.
What do we call a material that lets all light pass through it?
What is transparent
What causes sound?
What are vibrations?
Explain what light and noise pollution are.
Too much artificial light in the environment. Unwanted or excessive sound.
Which body part vibrates when sound enters the ear?
What is your eardrum?
Why do shadows form?
What is an object blocking the light?
Name 3 opaque materials.
What are walls, doors, desk, hands?
Explain amplitude. Give an example of something with a high amplitude and a low amplitude.
How loud a sound is (volume). High: shout, low: whisper.
Name 1 impact of light pollution and 1 impact of sound pollution.
Affects sleep, animal habitats. Stress, hearing damage, communication problems, etc.
What device helps people hear sounds more clearly and see images more clearly?
What are hearing aids, glasses, and contacts?
Name something that emits and something that reflect light.
What are candle, lightbulb, fire and cats eyes, moon.
What is it called when light bounces off a surface?
What is reflection?
Explain pitch. Give an example of something with a high pitch and something with a low pitch.
How fast vibrations occur within a set time. High: whistle, low: drum.
How would your day be different if you could not hear sounds around you?
Communication, alarms, music, warnings, conversations, etc.
Bats use echolocation. How does sound help bats survive?
It helps them find food, avoid obstacles, and move around in the dark.
Name three parts of the eye.
What are pupil, iris, retina, lens, optic nerve.
What is it called when light bends as it passes through a material?
What is refraction?
What unit is used to measure how loud a sound is?
What is a decibel?
A student is crossing a busy street. Explain how both light and sound help keep them safe.
They can see traffic lights, vehicles, and people; they can hear cars, horns, and warnings.
Many devices use both light and sound. Name one device and explain how it uses both.
Phone (screen + speaker)
TV (picture + sound)
Why can't we see objects in complete darkness?
No light is entering our eyes.
How is a shadow formed?
When an object blocks light.
Why can people hear you speaking from across the room?
What are the sound waves travel through the air to your ears?
How do our eyes and ears help us understand the world around us?
Eyes detect light so we can see; ears detect sound so we can hear and communicate.
Name one job where workers protect their hearing and one job where workers protect their eyesight. Explain why.
Construction worker → hearing protection
Airport ground crew → hearing protection
Welder → eye protection
Scientist in a lab → eye protection