- Physical Sciences
(also called or polypropylene) colourless transparent thermoplastic used where a flexible material is required.
this consists of three separate layers of the Earth â the crust, the mantle and the core.
a diagram that shows the electrons in the outermost occupied shell of an atom as dots or crosses...
a solution to which a little acid has been added to a lot of water.
the difference between the energy absorbed to break bonds and the energy transferred to the...