## How It's Made --- ### Review - Everything in our world is made up of elements. <!-- .element: class="fragment" data-fragment-index="1" --> - Hydrogen and Helium were created in the big bang. <!-- .element: class="fragment" data-fragment-index="2" --> - Heavier elements were created in stars and supernovae. <!-- .element: class="fragment" data-fragment-index="3" --> --- ### How are things made? <iframe style="margin: 0 auto; display: block;" width="940" height="560" src="https://www.youtube.com/embed/YDUTOo2tq3k?si=lSGUI39QgdkZGIOS" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe> --- ### Assignment Today you will be making a "How It's Made" presentation. Here's an example. --- ### Example Presentation: Frisbees!  --- ### Chemistry  --- ### How to Make Polyethylene 1. Get some ethylene gas. <!-- .element: class="fragment" data-fragment-index="1" --> 2. Pressurize it and add a catalyst. <!-- .element: class="fragment" data-fragment-index="2" --> 3. Add some color. <!-- .element: class="fragment" data-fragment-index="3" --> 4. Little plastic pellets! <!-- .element: class="fragment" data-fragment-index="4" --> --- <img src="/assets/slides/howitsmadefris.png" width="960" height="540" style="max-width:none;max-height:none;margin-top:-0.5rem;"> --- ### Energies Used in the Manufacturing - Motion - Thermal --- ### Sources - https://www.madehow.com/Volume-5/Frisbee.html