HUMAN EYE(10)
MOTION 2(9)
HEAT(10)
ELECTRIC CURRENT(10)
ELECTROMAGNETISM(10)
SOUND(9)
GRAVITATION(9)
FRICTION(8)
CHEMICAL EFFECTS OF ELECTRIC CURRENT(8)
HUMAN EYE(10)
MOTION 2(9)
HEAT(10)
ELECTRIC CURRENT(10)
ELECTROMAGNETISM(10)
SOUND(9)
GRAVITATION(9)
FRICTION(8)
CHEMICAL EFFECTS OF ELECTRIC CURRENT(8)