The key idea behind the scientific method is
A) the use of intuition in testing theories.
B) unbridled speculation about the world.
C) an appeal to supernatural explanations when natural explanations have not yet been found for a phenomenon.
D) the testing of ideas through controlled observations and experiments.
D
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All science and scientific discoveries are founded upon ________
A) competing hypotheses B) observations C) proven theories D) experiments
Which of the following activates the receptor sites for acetylcholine?
A) curare B) nicotine C) opiates D) none of these
The heat transfer process that circulates boiling water in a pot is called ____
a. convection b. advection c. conduction d. radiation e. latent heat exchange
What setting has the thinnest cover of sediment in the oceans?
A. oceanic trenches B. mid-ocean ridges C. continental shelves and slopes along passive margins D. abyssal plain