Hypothesis is a name given to a trial idea, tentative explanation, or working assumption that can be used to further investigation. Which of the following were hypotheses later proven to be true?
a. A vaccine might protect people from death from smallpox.
b. Gravity explains why apples fall from trees.
c. Lightning is simply a big electric spark.
d. All of these choices
Question 2
Induction reasons from evidence about some members of a class in order to draw a conclusion about all members of that class. It is employed in the empirical or scientific method that includes all but one of the following methods given below. Which method is that?
a. Analogical and causal reasoning
b. Investigation and testing
c. Following custom, authorities, and tradition.
d. Personal observation
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