TNSB - 8 - Science :: Minerals (Elements and Compounds) around Us

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Go To: TNSB-Science-Grade 8

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[Contributor - Gayathri Arun Kumar]


Dear Volunteer,


Please find below the detailed lesson plan and PPT for this chapter in the language mentioned against the respective link. While the lesson plan will give an overall flow of the lesson, the PPT will include lesson flow as well as the presentations for the class.


https://drive.google.com/open?id=13zU3hjmPhtDKs-M4z6GvXv2XTC5UPD6X (Lesson Plan - English)


https://drive.google.com/open?id=15E5HAM4pc5nLdOcG-8Xzl8o-COSm_2hV (PPT - Tamil)


You may use the content as it is or download and modify them to suit the students requirements.


If you feel any major modifications or additions are carried out by you in the form of adding any new activity, presentations, videos etc. we request you to send the modified version to submitcontent@evidyloka.org for enabling upload the modified version.


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


Kindly rate the lesson plan and share your suggestions and comments on the lesson plan in the comments box below. Your valuble suggestions and comments will help us to improve the content.


[Contributor - Kripa S]


https://www.youtube.com/watch?v=ZkHp_nnU9DY (Introduction to minerals - English)

https://www.youtube.com/watch?v=17l2LrjZi9o (Types of rocks)


[Contributor - Gayathri Arun Kumar]

Lesson plan version 1.1 videos

https://www.youtube.com/watch?v=C20hyBhJQdM (Pure substances)

https://www.youtube.com/watch?v=88MBCyiaPSM (identify pure substances or mixtures)

https://www.youtube.com/watch?v=Ze0kG4yeFS0 (Elements or compounds)

https://www.youtube.com/watch?v=F4Ht3yRICrI (names of elements - Tamil)

https://www.youtube.com/watch?v=zz9Jv2i3Z_Y (periodic table song - tamil)

https://www.youtube.com/watch?v=avgFqlNML5o

https://www.youtube.com/watch?v=5gUyRkQdavI (Valency)


[Contributor - Anu Nived]


http://keydifferences.com/wp-content/uploads/2016/10/solid-vs-liquid-gas.jpg (solids, liquids and gases)

http://pestrevenge.com/wp-content/uploads/2014/12/baking-soda-and-sugar.jpg (compounds around us - Sugar and baking soda)


[Contributor - Kripa S]


1. In your village, visit a place that has a fence of wire. Take few small marbles or pebbles along with you. Throw them all in one go into the fence. You will observe that few of the pebbles will pass through the fence to the other side, and few will get hit and bounce back. This is how the electrons also move.


[Contributor - Gayathri Arun Kumar]

Lesson plan version 1.1 activites

1. Ask the children to prepare a chart containing a list of Pure substances around them which they commonly use. Draw pictures wherever possible.

2. Take a little amount of mercuric oxide in a test tube. Heat it first gently, and then strongly in a bunsen flame. Observe the test tube. You will notice a silver mirror gradually appearing on upper part of the test tube and later, globules of mercury will be seen. Insert a glowing splinter into the test tube. The flame of splinter brightens showing the presence of oxygen. What does this tell you?

Explain using this video- https://www.youtube.com/watch?v=gTB4COQswLY

3. Take some water in a glass. This is liquid state. Now put it in the freezer/cold storage. It becomes ice which is in solid state. Now pour some water in a pan and boil. The vapor is the gas state.

4. Make the periodic table on a chart paper and hang/paste in the classroom. (group activity)

5. Analyze the number of elements if any present in your name.

6. Take a little sulphur in a spoon. Heat it. It burns while a blue flame disappears. You can smell a pungent smell. What is it due to?

7. Check whether sugar is a compound or not.

• Take some sugar in a test tube.

• Heat the test tube on a flame.

• The sugar will melt and turn brown.

• On further heating it starts charring and turning black.

• Look near the rim of the test tube. You will find small droplets of water.

• Since the water droplets have formed upon heating these cannot possibly be result of condensation from air. This shows that water has formed by decomposition of sugar.

• Black residue is carbon.

• So, sugar decomposed into carbon and water.

• We know that water is made up of elements of hydrogen and oxygen. This shows that sugar is a compound.


[Contributor - Gayathri Arun]

https://drive.google.com/open?id=0BzNF2YyqQxJ-TE9teGNtem5TcjA

[Contributor - Gayathri Arun Kumar]

Lesson plan version 1.1 PPT

https://drive.google.com/open?id=15E5HAM4pc5nLdOcG-8Xzl8o-COSm_2hV


[Contributor - Gayathri Arun]

Term Transliterated Term Translated Term
substance                                           சப்ஸ்டன்ஸ்                                              பண்டம்
composition                                        காம்போசிஷன்                                              இயைபு
properties                                      ப்ரா ப ர்டிஸ்                                            பண்புகள்
identical                                         ஐடென்டிக்கல்                                            முற்றொத்த
abundant                                            அபண்டன்ட்                                                மிகுதியான, மிகுந்த
subscript                                     ஸப் ஸ் க் ரிப்ட்                                        கீழ்க்குறி
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