Locating a target in a visual search task is facilitated when the target location is repeated on successive trials. Global statistical properties also influence visual search, but have often been confounded with local regularities (i.e., target location repetition). In two experiments, target locations were not repeated for four successive trials,…

THE PRINCIPLES OF ATOMIC STRUCTURE WHICH ARE STRESSED ARE THAT ATOMS ARE MADE UP OF A NUCLEUS WITH A POSITIVE CHARGE, SURROUNDED BY ELECTRONS WITH A NEGATIVE CHARGE, AND THAT THERE IS NO CHANGE IN THE ATOM WHEN THE POSITIVE AND NEGATIVE CHARGES ARE EQUAL. EXPERIMENTS ILLUSTRATE THAT CURRENT ELECTRICITY IS ACTUALLY ELECTRONS IN MOTION, THAT THERE…

A SERIES OF EXPERIMENTS TO BE PERFORMED WITH SMALL APPARATUS BY STUDENTS IS PRESENTED. PREPARATION OF DATA SHEETS AND ANALYSIS OF FINDINGS ARE ENCOURAGED. IN THE CATEGORY OF MATTER AND MOLECULES, THE CONCEPT TO BE DEVELOPED IS THE DETERMINATION OF WHETHER THERE ARE EMPTY SPACES IN AIR AND IN LIQUIDS. EXPERIMENTS WITH INERTIA, THE LAW OF SPRINGS,…