Which of the following is not part of a good scientific theory?
A) A scientific theory should be based on natural processes and should not invoke the supernatural or divine.
B) A scientific theory cannot be accepted until it has been proven true beyond all doubt.
C) A scientific theory must explain a wide variety of phenomena observed in the natural world.
D) A scientific theory must make testable predictions that, if found to be incorrect, could lead to its own modification or demise.
B
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Cosmetologists are the astronomers and physicists who do research in cosmology
a. True b. False Indicate whether the statement is true or false
The difference between a DC and an AC generator is that
a. the DC generator has one unbroken slip ring. b. the AC generator has one unbroken slip ring. c. the DC generator has one slip ring split in two halves. d. the AC generator has one slip ring split in two halves. e. the DC generator has two unbroken slip rings.
What evidence leads scientists to conclude that life was present on Earth within a billion years of its formation?
A) Such early existence of life is the only way to explain the variety of life-forms seen today. B) Fossil evidence of life dates back to this time. C) Studies of DNA indicate that life must have been present by that time.
A transformation occurs in a material, and the Gibbs free energy change in the material is negative. The transformation is _____________.
Fill in the blank(s) with the appropriate word(s).