Sources of Light
What is something that makes its own light called?
A source of light
Why can we see objects?
Light reflects into our eyes
How does light travel?
In a straight line
What is formed when light is blocked?
A shadow
What causes day and night on Earth?
Earth spinning (rotation)
Give one example of a source of light.
Sun, candle, lamp
What happens when light hits a surface?
It reflects (bounces)
Can light travel around corners?
No
What blocks light to make a shadow?
An object
How long does Earth take to rotate once?
24 hours
Is the Moon a source of light?
No
What word describes light bouncing off a surface?
Reflection
What do we call a thin line of light?
A ray
What is the main light source for shadows outside?
Sun
What do we call Earth spinning on its axis?
Rotation
Why is the Moon not a source of light?
It reflects light from the Sun
What type of surface reflects light best?
Smooth, shiny surface
What diagram shows how light travels?
Ray Diagram
When is a shadow shortest?
Midday
Does the Sun move across the sky, or does Earth move?
Earth moves
What is the main source of light for Earth?
The Sun
What do we call the picture seen in a mirror?
Image
In a ray diagram, what do arrows show?
The direction of light
When are shadows longest?
Morning and late afternoon
Why do we see the Sun in different positions during the day?
Because Earth is spinning