We haven't ton a ton of chemistry lately in school, so it was fun learning about some basics like chemical and physical changes and chemical reactions with the kids. We did a bunch of the classic demonstrations like convection currents and baking-soda-and-vinegar and hydrogen-peroxide-and-yeast reactions. (Here's a fact sheet and experiment page for that last one.)
I love their pleased smiles as the reactions work
…some of them had pleased smiles, anyway.
They liked this "fireworks in a jar" demonstration too (instructions here, but you can just google "fireworks in a jar" if that link breaks; there are tons of examples of it)
The kids really liked making these fireworks "models" out of lentils and poppyseeds and so forth. (That smiley face Ziggy made is how they really would make one of those shaped hearts or smiley faces you see sometimes at fireworks shows!) You can look at pictures of cross-sections of real fireworks to get an idea what they look like and how to make them (one is here, and we'd also watched a few documentaries about the process).
https://www.reddit.com/r/ThingsCutInHalfPorn/comments/8z0a46/cross_sections_of_fireworks_1761_x_1125/ cross sections
https://www.youtube.com/watch?v=n1ixjhzwr_E how fireworks work
••https://www.youtube.com/watch?v=lfkjm2YRG-Q&t=963s fireworks
https://www.youtube.com/watch?v=mS7AXFcvkS4 How it’s made
https://www.youtube.com/watch?v=xuZdCvcZyxw How it’s made
https://www.youtube.com/watch?v=n1ixjhzwr_E how fireworks work
••https://www.youtube.com/watch?v=lfkjm2YRG-Q&t=963s fireworks
https://www.youtube.com/watch?v=mS7AXFcvkS4 How it’s made
https://www.youtube.com/watch?v=xuZdCvcZyxw How it’s made
No matter how much tape we put over these sections, some of the seeds and beans always get out!
This is Gus pretending to be a fireworks man, in his safe little hut with all his computer-controlled display set out for the show!
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