How can they do science if they don’t understand the difference?

In English there is no difference between
weight and mass,
newtons and kilograms,
minerals and metals,
benefication and beneficiation?
How can they do science if they don’t understand the difference?

Weight is measured in newtons but mass in kilograms.
In science and engineering, the weight of an object is related to the force acting on the object. W=mg. Wikipeia

PhD Natalia Petrovskaya