A. Gold
B. Aluminium
C. Mercury
D. Platinum

A. Gravity
B. Volcano
C. Earthquake
D. Tsunami

A. Battery
B. Generato
C. Television
D. UPS

A. Air
B. Sand
C. Vacuum
D. Water

A. Rain Checker
B. Rain measures
C. Rain gauge
D. Rain rod

A. LB. Johnson
B. William Rogers
C. Neil Armstrong
D. Martin Luther King

A. Isaac Newton
B. Thomas Edison
C. Alexander Fleming
D. Gulielmo Marconi

A. Speed of light
B. Intensity of sound
C. Intensity of heat
D. None of these

A. Beta rays
B. Alpha rays
C. Gamma rays
D. Cathode rays

A. Jabir Ibn Hayyan
B. Ibn Al-Haitham
C. Ibn Rushd
D. Nasir Al-Din