What is light?
Light is a form of energy that enables us to see the things around us.
Why is light important for us?
Light brightens our world and makes it visible.
What would happen if there were no light?
If there were no light, we would not be able to see anything.
What are objects that produce their own light called?
Objects that produce their own light are called light sources or luminous objects.
What type of light source is the Sun?
The Sun is a natural light source.
Why is the Sun our main source of light?
The Sun is our main source of light because it produces its own light and shines on Earth.
Name two natural light sources besides the Sun.
Stars and lightning are natural light sources.
Which animals can produce their own light?
Fireflies and most jellyfish can produce their own light.
What do animals like fireflies do in the dark?
They glow in the dark.
What are artificial light sources?
Artificial light sources are light sources made by humans.
Give two examples of artificial light sources that do not use electricity.
A lighted candle and a campfire are artificial light sources that do not use electricity.
Give two examples of artificial light sources that use electricity.
A glowing light bulb and a traffic light use electricity to produce light.
What are objects that do not produce their own light called?
They are called non-luminous objects.
Can we see non-luminous objects in the dark?
No, we cannot see non-luminous objects in the dark.
Give two examples of non-luminous objects.
Food and color pencils are non-luminous objects.
Why can we see the rays of sunlight through the trees?
Because light travels in a straight line.
