Discussion: Value of competing theories

Discussion: Value of competing theories

Discussion: Value of competing theories

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Question 7 (Multiple Choice Worth 2 points)

A pair of scientists proposes two different theories to explain the same set of observations. Which of the following best explains the value of these competing theories?

[removed] Competing theories can be a source of new, testable ideas.

[removed] Competing theories are necessary to transform a theory into a law.

[removed] Competing theories generate controversy that helps popularize ideas.

[removed] Competing theories allow scientists to combine the most interesting aspects of both theories.

Question 8 (Multiple Choice Worth 2 points)

Scott stated the following series of observations. Which represents a theory?

[removed] I observed three stars in the sky.

[removed] The stars give off light.

[removed] Light travels at 300,000 kilometers per second.

[removed] Stars are balls of hot gases.

Question 9 (Multiple Choice Worth 2 points)

Which of the following objects would require the use of a large-scale model?

[removed] An atom

[removed] A car engine

[removed] A frog’s heart

[removed] The Mississippi River

Question 10 (Multiple Choice Worth 2 points)

Which best describes how equations are used in science?

[removed] An equation is a type of graph.

[removed] An equation is a type of theory.

[removed] Equations use symbols to represent data.

[removed] Equations show the locations of distant objects.