ATOMS, ATOMS AND MORE ATOMS! hehehe :D
Guys, the first video is the easiest and the one you need to watch.... AT LEAST!
The other two videos, you can play them with subtitles in Spanish if you need it.
The topic is a bit difficult and you may need it...Otherwise, you can try to watch them all with English subtitles (that would be GREAT!)
If you want to get a higher mark in Science, give me a brief summary about any of these videos by 10th of June.