A. they stop and then start shining Occasionally
B. they are a conglomeration of many stars which shine but one at a time
C. of the disturbances in the atmosphere of different densities
D. of the presence of strong winds
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A. lakes of lava that got trapped beneath the earth
B. various chemicals that acted on each other under the weight of overground earth
C. ancient trees and plants
D. lava
A. 750 miles
B. 345.7 miles
C. 1440 miles
D. 475.5 miles
A. secondary colors
B. primary colors
C. light colors
D. faded colors
A. oil
B. natural gas
C. coal
D. atomic energy
A. Alexander Fleming
B. Morse
C. Marconi
D. Bell
A. Visible blue light
B. Yellow light
C. X-rays
D. Infrared rays
A. respiration and reproduction
B. reproduction and locomotion
C. locomotion and respiration
D. excretion and digestion
A. bone cells
B. platelets
C. red blood cells
D. white blood cells
A. gases decreases and liquid increases
B. gases increases and liquids decreases
C. both gases and liquids increases
D. both gases and liquids decrease
