Difference between revisions of "DSERT - 7 - Science :: Hard water and Soft water"
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Revision as of 08:30, 12 July 2017
Go To: DSERT-Science-Grade 7
- Lesson Plan
- Textbook
- Videos
- Images
- Activities
- Additional Aids
- Transliteration
- Worksheets
- Assessments
[Author - Anu Nived]
Objective: To teach the students about hard water/soft water
Subtopics to be covered:
- Methods to soften hard water
- Heavy water
- Types of hydrogen atom
Learning Outcome:
- Students know about the difference between hard and soft water
- They know about the disadvantages of hard/heavy water
[Author - Kripa S]
http://ktbs.kar.nic.in/new/website%20textbooks/class7/7th-kannada-science-01.pdf#page=137 (Kannada Medium)
http://ktbs.kar.nic.in/new/website%20textbooks/class7/7th-english-science-01.pdf#page=137 (English Medium)
[Author - Anu Nived]
http://www.goldwatergroup.ca/wp-content/uploads/2016/10/eagle-water-treatment-hard-water.jpg (effects of hard water)
http://www.vanislewater.com/sites/default/files/img_gallery/water%20treatment/hard-soft-water.jpg (hard and soft water)
[Author - Kripa S, Nandini N]
1. Take two glasses of water. Add salt in one glass and mix well. Now add one pinch of soap powder in both the glasses of water. You will observe that the soap dissolves faster in the water without salt (soft water), but takes more time to dissolve in salt water (hard water)
2. When you store hard water in a vessel, you will see salt sediments in the vessel after water evaporates. Observe at home and share your points.
3. https://drive.google.com/open?id=0BzNF2YyqQxJ-RHV1NTBmbkdkbE0
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