51. What is the name of the process by which stars generate energy?
a) Nuclear fusion
b) Nuclear fission
c) Radioactivity
d) Chemical reactions
52. What is the name of the process by which a star runs out of fuel and collapses in on itself?
a) Supernova
b) Nova
c) Black hole
d) White dwarf
53. What is the name of the theory that explains the origin and evolution of the universe?
a) Big Bang Theory
b) Evolution Theory
c) Quantum Theory
d) Relativity Theory
54. What is the name of the force that causes objects to be attracted to each other?
a) Electromagnetic force
b) Gravitational force
c) Strong nuclear force
d) Weak nuclear force
55. What is the name of the instrument used to measure the brightness of stars?
a) Telescope
b) Spectroscope
c) Photometer
d) Gravimeter
