Is the mantle solid or liquid

Conductors, Insulators and SemiconductorsObjectives üStudents will acquire a basic understanding of electrical conductors, insulators and semiconductors.Suggested Grade Level7th gradeSubject AreasScience Industrial TechnologyTimelineInquiry and discussion, one 45-minute class periodHands-on activities, one to two 45 minute class periodsWriting assessment, to be completed as homeworkBackground KnowledgeStudents need to have a basic knowledge of electricity and, how to conduct internet searches to find specific information about a certain subject. Suggested websites for the student internet searches are: http://www.howstuffworks.com, http://www.google.com, http://www.ask.com, http://www.altavista.com Students need to have the ability to read and follow instructions. Electronic kits must be ordered ahead of time. A suggested web site is listed in the materials section below, comparison-shopping is recommended. Materials Electronic project kit http://www.abra-electronics.com/catalog/kits/eki_1101.htmlInternet capable computersLessonDay 11. Introduce the topics of our internet search; conductors, insulators and semi-conductors. Ask students what they think would make a good conductor, insulator, and also what they believe a semi-conductor might do. 2. Divide students into groups of 3 or so. Have these groups complete the following internet search work sheet, see addendum. Allow 15 to 20 minutes for the groups to complete their searches. 3. Bring students back together and discuss their findings. Ensure that all students have the correct answers to the internet search questions.
Information SearchConductors, Insulators and SemiconductorsName_________________________________1. What are electrical conductors?________________________________________________________________________________________________________________________________________________________________________________________________2. List the four materials that are good conductorsa.___________________________________b. ___________________________________c. ___________________________________d. ___________________________________3. What makes a good conductor, a good conductor? ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________4. What is an electrical insulator?________________________________________________________________________________________________________________________________________________________________________________________________5. Why is a good insulator a good insulator?________________________________________________________________________________________________________________________________________________________________________________________________6. List 3 materials that make good conductors?a. ___________________________________b.___________________________________c.___________________________________7. What is a semi-conductor?________________________________________________________________________________________________________________________________________________________________________________________________