The fuse sets off a charge, which ignites the gunpowder. This
propels the firework into the sky.
Once the firework is in the sky, the gunpowder within the
firework ignites. This causes the ‘stars’, which contain metal
salts and iron filings, to explode in different colours and
sparkles. If the firework is in sections, the tars can be in
different compartments. These compartments explode at different
times, making different patterns.
The pattern of stars around the central gun powder charge
creates different patterns of fireworks. For example, if the stars
are in a circle around the black powder charge, you get a circle
display of colour. One mistake in the placing of the stars
and the whole pattern will be ruined!
i love this guy 60% of every video is him rolling around on the floor screaming while his camera guy goes “hey….. u ok?” then 5 minutes later he gets up and is like “ok folks, there u have it, the Satan DeathRay Fire Monster actually does cause pain when it bites u. science is great”
I learned in a history class that because Einstein was an immigrant none
of the US (white) colleges or universities would let him join their
faculty but black colleges and universities welcomed his brilliance with
open arms.
it wasn’t because Einstein was an immigrant, it was because he was Jewish
When scientists step outside their safe laboratories, anything can happen. Of course, studying wild animals or digging out million-year-old fossils sounds exotic and exciting, but that’s only one side of the spectrum. The other side is sometimes gross and scary but mostly it’s hilarious. In 2015 scientists started sharing their most embarrassing #Fieldworkfails, and recently French illustrator Jim Jourdane has decided to compile the most memorable ones and turn them into amusing whimsical drawings. (Source)
The Perfect Scientist 