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In this Science Max Quiz, Phil explains how to differentiate chemical and physical changes. He mentions that chemical changes produce new molecules, while physical changes don't. He includes several examples of both physical and chemical changes.
Beakman explains what a chemical reaction is and then shows examples of three kinds of reactions which he explains are like partnerships: synthesis (marriage), decomposition (divorce), and double displacement (do-si-do).
Phil explains how glow sticks product light: by combining two different chemicals. He maxes out the experiment and explains the chemical reaction in more detail.
Walter fooled 2 drug dealers by telling them that he was making Meth, instead, he released a deadly gas using Red Phosphorus.
This clip explains the different between chemical evolution and biological evolution.