Nature of Science

Why should an experiment be repeated?

• to form a hypothesis
• to reduce the chance of error
• to change controls
• to identify the problem

What is the first step in a commonly used scientific method?

• digging for artifacts
• drawing conclusions
• controling variables
• recognizing a problem

A scientific conclusion is based on 

• variables and experiments
• observations and questions
• facts and observations
• tools and evidence

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A valid scientific investigation must be able to be

• replicated
• graphed
• predicted
• observed

A hypothesis is 

• an educated guess that has yet to be proven by experiment.
• close agreement by competent observers of observations of the same phenomena.
• a guess that has been tested over and over again and always found to be true.
• a synthesis of a large collection of information that includes guesses.

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The difference between a hypothesis and a theory is that a hypothesis is 

• never true whereas a theory is always true.
• true whereas a theory is not true.
• never true whereas a theory is sometimes true.
• an educated guess whereas a theory has been tested successfully many times in many ways.

Which of these is a scientific hypothesis?

• Atoms are the smallest particles of matter that exist.
• Albert Einstein is the greatest physicist of the twentieth century.
• The universe is surrounded by a second universe, which cannot be seen.

Science, art, and religion do not contradict one another because 

• if you choose religion and art you can forget about science.
• all three have different domains.
• if you choose the right one, you can forget the other two.
• if you choose science you can forget about religion and art.

Which of the following is a reason to express scientific findings mathematically?

• The findings become more difficult to prove by experiment.
• The findings become easier to verify by experiment.
• The findings become more confusing.
• The findings become less appealing to the public.

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Mr. McNeice wanted to know if different types of music affected people's heart rates, so he played different music and checked their pulses.  What is the dependent variable?

• type of music
• heart rate
• how long they listend to music
• Mr. McNeice