The force of atraction is called : __________________
magnetism
This is an example of : ____________ of light
dispersion
This is a _________ lens.
concave
This is an example of : ___________ light
reflection
You can raise a flag up a pole with a _________
pulley
A ___________ is a substance that attracts some material with an invisible force.
magnet
A wheel is an example of : _____________ machine
simple
Every magnet has: __________ and _________ pole.
north and south pole
The outer transparent layer of the eye is called :__________
cornea
A bike is an example of ___________ machine
complex
This is a ________ lens.
convex
It has a groove which round and round in spiral shape.
screw
These are : _________ objects
magnetic
The change of direction When light passes at an angle into another is called : ______
refraction
It´s a special wheel with teeth around its edge.
gear