Use "physical sciences" in a sentence

1. By reference to the Merriam Webster dictionary, (part of Appendices 1 and 2 to Exhibit A1), he argued that physical sciences was defined as sciences such as physics, chemistry and astronomy.

Se référant au dictionnaire Merriam Webster (partie des annexes 1 et 2, pièce A1), il prétend que les sciences physiques renvoient à des sciences telles que la physique, la chimie et l'astronomie.