Question

graded assignment
unit test: intro to physical science, part 2
answer the following questions. when you have finished, submit this assignment to your teacher by the due date for full credit.
total score: ___ of 10 points

(score for question 1: ___ of 5 points)

1. how is the word theory as it is used in science different from the common use of the word outside of science?

type your answer here:

(score for question 2: ___ of 5 points)

1. jenny wants to determine if a new brand name washing detergent is better than her old detergent. she washes 10 dirty t - shirts with the new washing detergent. after washing, she thinks they are cleaner using the new detergent. what can she do to be sure the new washing detergent works better than the old detergent?

type your answer here:

Explanation:

Question 1

In common use, a "theory" is often a guess or unproven idea (e.g., "I have a theory about why she's late"). In science, a theory is a well - substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment (e.g., the theory of evolution, atomic theory). It is not a guess but a comprehensive framework that makes predictions and is supported by extensive evidence.

To be sure, Jenny should conduct a controlled experiment. She should wash 10 similar dirty T - shirts with the old detergent under the same conditions (same water temperature, washing machine settings, amount of detergent, etc.) as she washed the T - shirts with the new detergent. Then she can compare the cleanliness of the T - shirts washed with the new and old detergents. This way, she can isolate the variable (the detergent) and accurately determine if the new one is better.

Answer:

In common use, "theory" often means a guess or unproven idea. In science, a theory is a well - supported, comprehensive explanation of natural phenomena, backed by extensive evidence from observations and experiments.

Question 2