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

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.

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.

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