Difference between revisions of "NCERT - 8 - Science :: Chemical Effects of Electric Current"
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'''Objective:''' To teach the students about the chemical effects of electric current | '''Objective:''' To teach the students about the chemical effects of electric current | ||
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Revision as of 09:44, 4 September 2017
Go To: NCERT-Science-Grade 8
- Lesson Plan
- Textbook
- Videos
- Images
- Activities
- Additional Aids
- Transliteration
- Worksheets
- Assessments
[Contributor - Anu Nived]
Objective: To teach the students about the chemical effects of electric current
Subtopics to be covered:
- To test whether liquids conduct electricity
- Electroplating
Learning Outcome:
- Students know that some liquids are good conductors of electricity while some are bad.
- They know about the chemical effects of currents
[Contributor - Kripa S]
http://epathshala.nic.in/wp-content/doc/book/flipbook/ClassVIIIFlipbook/0855-Vigyan/Chapter-14/index.html (NCERT Hindi Medium)
http://epathshala.nic.in/wp-content/doc/book/flipbook/ClassVIIIFlipbook/0854-Science/Chapter-14/index.html (NCERT English Medium)
https://drive.google.com/open?id=0BzNF2YyqQxJ-eEQzaV9pMFhzcVU (JEPC Board) (Hindi Medium)
[Contributor - Kripa S]
https://www.youtube.com/watch?v=KMKjUqf50PU (what is electricity)
https://www.youtube.com/watch?v=QZPURSF5iH4 (electric conductivity)
[Contributor - Anu Nived]
http://www.ekshiksha.org.in/images_chemical_effects_VIII/figure_2.JPG (chemical effects of electric current example 1)
http://2.bp.blogspot.com/-mdaj8l9qz70/UWKdtYALGlI/AAAAAAAACRA/oI5QH9oZpxE/s1600/CBSE_CLASS_8th_SCIENCE_Chapter_14_CHEMICAL_EFFECTS_OF_ELECTRIC_CURRENT.jpg (purification of copper)
https://s-media-cache-ak0.pinimg.com/originals/d8/22/51/d822512387a817ddcafb66f5bb95235c.jpg (electroplating)
[Contributor - Kripa S]
1. Take about two teaspoonfuls of distilled water in a clean and dry plastic or rubber cap of a bottle. (You may obtain distilled water from your school science lab. You may also get distilled water from a medical store or a doctor or a nurse). Use the tester to test whether distilled water conducts electricity or not. What do you find? Does distilled water conduct electricity? Now dissolve a pinch of common salt in distilled water. Again test. What do you conclude this time?
2. Test the conduction of electricity through various fruits and vegetables. Display your result in a tabular form.
[Contributor - Tejashri Khadilkar]
https://drive.google.com/open?id=0B4m07xnDF8JpNldlUlI2SXEtUE0 (Ans Key 1)
https://drive.google.com/open?id=0B4m07xnDF8JpeHN0S2dJelZoRlk (Ans Key 2)
[Contributor - Tejashri Khadilkar]
https://drive.google.com/open?id=0B4m07xnDF8JpWElyVk1Fa2xIcU0 (Worksheet 1)
https://drive.google.com/open?id=0B4m07xnDF8JpZ3MtZHlHTGNURDQ (Worksheet 2)
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