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Khan academy features videos that help explain content.
There are videos in English at https://www.khanacademy.org/library
Unfortunately, they have no videos that have been submitted by speakers of Tagalog. There are many in other langauges such as Chinese and Spanish https://crowdin.com/project/khanacademy
Chemistry:
Endothermic and exothermic reactions
exo= heat is given off
endo=heat is taken in
This explanation is on Khan Academy but is not a video:
ANother site gives a good diagram: http://www.discoveryexpresskids.com/blog/exothermic-vs-endothermic-chemistrys-give-and-take
Other videos
How to balance equations
https://www.youtube.com/watch?v=TUuABq95BBM
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