Which of the following claims cannot be tested by science?
A) The Earth was created by God.
B) The Sun goes around the Earth.
C) The geometry of the universe is curved.
D) This drug will cure cancer.
E) Smoking shortens people's lifespans.
A
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Which of the following statements about the sunspot cycle is not true?
A) The number of sunspots peaks approximately every 11 years. B) With each subsequent peak in the number of sunspots, the magnetic polarity of the Sun is the reverse of the previous peak. C) The rate of nuclear fusion in the Sun peaks about every 11 years. D) The cycle is truly a cycle of magnetic activity, and variations in the number of sunspots are only one manifestation of the cycle. E) The number of solar flares peaks about every 11 years.
Our senses may obtain less-than-accurate information concerning our physical world because they
a. have limited sensitivity. b. have a limited range. c. are useless. d. can be deceived.
What is the intensity of sound from a band with a sound level of 120 dB? (I0 = 10-12 W/m2)
a. 1 W/m2 c. 10 W/m2 b. 1.2 W/m2 d. 12 W/m2
The aurora borealis (northern lights) are caused by
a. sunlight reflecting from polar ice b. emissions from atoms and molecules in the upper atmosphere excited by electrons from the sun c. thunderstorms d. an unknown process