UBSE - 8 - Science :: Chemical Effects of Electric Current

Go To: UBSE-Sci-Grade 8

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Course content
Textbook
Teaching learning resources

Course Content / Subtopic list:

Chemical effect of electric current
Good and bad conductors of electric current with examples
Electroplating

Expected Learning Outcome:

SWBAT-

Explain the chemical effects of electric current
Define electroplating
Distinguish between poor conductors and good conductors with examples

English Medium

English medium textbook

Hindi Medium

Hindi medium textbook

Lesson Plan

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Chemical Effects of Electric Current Lesson Plan - (Lesson Plan - English)

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The worksheets of the lesson can be accessed from the worksheet tab.

Videos

[Author - Kripa S]

https://www.youtube.com/watch?v=KMKjUqf50PU (what is electricity)

https://www.youtube.com/watch?v=QZPURSF5iH4 (electric conductivity)

Images

[Author - 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)

Activities

[Author - 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.