Light travels in a ______.
What is Straight Line?
A dark area made by an object between a ray of light and a surface.
What is a shadow?
The primary colours of light.
What are Red, Green and Blue?
The speed of light?
What is 300,000 km per second?
The moon is an example of something that does not ____ its own light.
What is emit?
Light that is produced by things in nature, like the Sun.
What is Natural Light?
Sound travels in _______.
What are Waves?
In sound, The number of vibrations made per second
What is frequency?
Light from things made by humans, powered by electricity or gas.
What is Artificial Light?
Sound is measured in ______.
What is decibels?
The sound from a cricket is an example of a _____ frequency sound.
What is high?
What it is called when light passes through an object and bends.
What is reflection?
What is echolocation?