The document describes 4 experiments carried out by students: 1) An experiment to determine how the length and position of a shadow changes as a torch is moved. It found the shadow length decreases as the torch moves away. 2) An experiment comparing the growth of maize plants in two plots, finding one plot's plants grew taller and healthier. 3) An experiment comparing the surface temperatures and distances of 4 planets from the Sun, finding temperature decreases with distance from the Sun. 4) An experiment comparing the growth of dough with and without yeast over 1 hour, finding the yeast dough grew larger.