To the owner, the demon may be causing the intake flow problem, but that is of no concern to the mechanic. She does not know if demons exist because they are not measurable . This is a natural cause which explains the naturally occurring event. Items which cannot be currently perceived by the senses cannot currently be dealt with by science. Viruses, onetime thought to be evil spirits now are thought to be protein-wrapped genetic material.
Students complete the assignment.
When completed, the teacher will solicit a sampling of results to share with entire class, using overhead or chalk board, discussing any differences until class recognizes reasons why each term goes where it does. Use one copy to make overhead transparencies. Be sure to shuffle the terms, so they will not be taken out in proper sequence. Then go to a description of What Science IS . If the reader believes this to be the case, please let us know, and appropriate corrections will be made.