Science in the Library

I'm trying to catch up on my blogging... Back in summer, as part of our STEAM 2018 year of STEAM programming, we did a fun engineering project making roller coaster ski jumps out of pipe insulators for marbles to "ski" down! I've been meaning to share the photos and videos and finally had time today. Here are the supplies I got: Pipe insulators Marbles Masking Tape I had to cut the pipe insulators in half, and did that from home. So you also need a strong knife, like for cutting meat but maybe sturdier than that. Then you have the kids get in groups of 3 or 4 and give each group of kids some insulator tubes and tape and some props and have them go to town! Each group will need a large space to work in, and one pitfall was kids trying to build their roller coasters around the other groups. That got hard sometimes, and they're kids, so they had difficulty navigating that in a polite way sometimes. I really wish I had provided more simple pr...

Last week kids came to Pasadena Library to learn about elastic energy and the Law of Conservation of Energy , and then build a helicopter that would rise up in the air at least briefly before coming down. We attached helium balloons to a homemade helicopter that runs on the elastic energy of a twisted-up rubber band, and since the apparatus itself is heavy enough, the whole thing generally floats gently down. (OK, some kids did have to add a weight in order to counteract the extreme lift of the helium.) Kids had a blast making their helicopters, even though it was not an easy project, and required a lot of tinkering and troubleshooting! I did this program before at Pasadena Public Library, and shared it on my blog a few years ago . I'm sharing this year's experience because I think I learned some things that might have improved the project back then. I first found the project in 2014 on curiositymachine.org . You may have to subscribe to get access to all their projec...

For today's Curiosity Machine classes, our last meeting of the four-week session, we did an exciting project from the Curiosity Machine website: balloon helicopters ! We learned about different kinds of energy, particularly elastic potential energy. Elastic potential energy is the potential energy stored when you bend, stretch or deform an object, and that energy converts to kinetic energy as the object bounces back. Here's a great website that explains it pretty well: Physics 20 Project . We discussed examples of elastic potential energy using a Family Feud presentation I made on Scratch. You can click on the image below to see the project, though it's supposed to be used as a tool for discussion: The project itself was challenging and I'm glad I worked on my sample ahead of time. But it's so exciting to see those balloons fly! First, you have to cut a boba straw to about the same length as the rubber band you plan to use (when it's at equilibriu...

Today's project was designing a wind-powered water pump! We discussed the history of harnessing the wind to power machines, from Hero of Alexandria's wind-powered pipe organ in the 1st century A.D. to the wind pumps used in Muslim cultures in the Middle East and Central Asia, to the windmills created by the Dutch (which--I didn't know before--could mill grain AND pump water from the ground!). The book I mentioned in our discussion today was called Wind Power , written by Ian Graham and published by Raintree Steck-Vaughn Publishers. We talked about Daniel Halladay, the American inventor of the wind pumps used in farms across America. We talked about the Law of Conservation of Energy, how energy is never created or destroyed, but only changes form--in this case, changing from kinetic energy to mechanical energy, and in wind turbines that power homes, it is also converted to electrical energy. We talked about converting different kinds of motion using a mach...