What is Light?
What kind of energy is light?
Bright energy we can see.
Name one natural light source.
The Sun.
What do we call a man-made light?
Artificial light.
Does light travel in curves or straight lines?
Straight lines.
What is a shadow?
A dark shape made when light is blocked.
What is reflection?
When light bounces off a surface.
What is a rainbow?
A colorful arc in the sky.
What do our eyes need to see?
Light.
What is the biggest and brightest natural source of light?
The Sun.
What natural light source did people long ago use for cooking and warmth?
Fire.
Give one example of an artificial light source.
Light bulb, lamp, torch, candle, streetlight, car headlight, or screens.
What happens when light hits a mirror?
It reflects (bounces back).
On which side of the light source does a shadow form?
On the opposite side.
Name one smooth surface that reflects light.
Mirror, glass, water, shiny metal.
What three things are needed for a rainbow?
Sunlight, water droplets, and the right angle.
Why do plants need sunlight?
To grow and make food.
What happens when there is no light?
We cannot see; it’s total darkness.
What is bioluminescence?
Light made by living things.
What artificial light source is portable and good for camping?
A torch (flashlight).
What do dark colors, like black, do to light?
Absorb it.
When are shadows shortest during the day?
At noon.
Why don’t we see reflections on rough surfaces?
Because light scatters in many directions.
What is the bending of light called?
Refraction.
Name one way light helps us stay safe.
Streetlights, headlights, lamps at night.
How fast does light travel?
About 300,000 km per second.
What natural event lights up the sky during thunderstorms?
Lightning.
Which artificial light uses a wick and wax?
A candle.
What is it called when light passes through clear glass?
Transmission (transparent).
How can shadows look different depending on distance?
Closer = bigger shadow; farther = smaller.
What reflects the Sun’s light for us to see at night?
The Moon.
What are the seven colors of the rainbow in order?
Red, Orange, Yellow, Green, Blue, Indigo, Violet (ROYGBIV).
How does light help scientists study space?
By analyzing light from stars and planets.
Why is light important for living things?
It helps us see, grow plants, stay safe, and live.
Name two bioluminescent animals.
Fireflies, anglerfish, jellyfish, squid, or glowing mushrooms (any two).
Why are both natural and artificial light sources important?
hey help us see, live, work, play, and stay safe.
Name the three types of materials based on how they interact with light.
Transparent, translucent, opaque.
Why do shadows change size during the day?
Because the Sun changes position in the sky.
Name an animal whose eyes reflect light at night.
Cats, raccoons (others possible).
What is a double rainbow, and how is it different?
A second, fainter rainbow with reversed colors.
Without light, what five daily activities would be impossible?
Reading, working, playing, growing food, staying safe.
How long does it take sunlight to reach Earth?
About 8 minutes.
How do bioluminescent animals like fireflies and deep-sea fish use their light?
To attract mates, find food, or protect themselves.
Why do we rely more on artificial light at night than natural light?
Because the Sun is gone, and artificial light lets us work, travel, and stay safe after dark.
What do we call it when light changes direction as it passes from air into water or glass?
Refraction.
Why are shadows longer in the morning and evening but shorter at noon?
Because the Sun is lower on the horizon in morning/evening and directly overhead at noon.
Why does a rough surface not give a clear reflection like a mirror?
Because light rays scatter in different directions instead of bouncing evenly.
Why does red always appear on the top of a rainbow and violet on the bottom?
Because red light bends the least and violet light bends the most during refraction.
Give three examples of jobs or fields that rely on understanding light.
Photography, filmmaking, astronomy, medicine (lasers), architecture, plant science. (Any 3)