The Sun produces most of its energy by_____________?
A. Nuclear fusion
B. nuclear fission
C. Burning hydrogen
D. None of these
A. Nuclear fusion
B. nuclear fission
C. Burning hydrogen
D. None of these
A. An equal and opposite pressure acts from inside
B. of the height of a man
C. of gravity
D. Earth pulls the man upward
A. Bronchiole
B. Larynx
C. Pharynx
D. Trachea
A. Retina
B. Iris
C. Cornea
D. Optic nerve
A. Aristotle
B. Gregor Joghn Mandle
C. Theophrastus
D. Corlous Linnaeous
A. cerebellum
B. cerebrum
C. hypothalamus
D. medulla
A. Phosphorous
B. Bromine
C. Chlorine
D. Helium
A. Graphite
B. Silicon
C. Charcoal
D. Phosphorous
A. 2
B. 3
C. 4
D. 5
A. Color blindness
B. Depression
C. Hypertension
D. Inability to sleep