I also work with the modern chaos magick elements.
Space, as in dimensional space (not outer space), that which we all move in, corresponds with Air.
Forces, which includes heat, light, gravity, and radiation, corresponds with Fire.
Matter, the most common way things are represented in the material universe, corresponds with Earth.
Time, the passage of all things forwards and backwards in order, corresponds with Water.
Then I have an element I developed personally (though there may be others that have come to the same conclusion).
Information, that which makes up the universe. All things are at their root only information we perceive.