In science, a theory is
A) an educated guess.
B) less than a fact.
C) a synthesis of a large body of well-tested knowledge.
D) unchangeable.
C
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A toy cart moves with a kinetic energy of 40 J. If it moves with twice the speed, its kinetic energy will be
A) 40 J. B) 80 J. C) 160 J. D) unknown unless we know the mass of the cart.
Antarctic ice has been there for several million years. What has happened to the Antarctic continent as a result?
Compare the greenhouse effect on Earth to that on planetary bodies such as the Moon and Venus
What will be an ideal response?
The comparison of the goods and services the same amount of money can actually buy in different countries is an economic measurement of development known as ________.
A. currency exchange rate B. gross national product C. gross domestic product D. purchasing power parity