Trap Water with Holes

You can keep water inside a glass by covering the top of the glass with a piece of cardboard full of holes! To trap water with holes you need: a glass water thin cardboard thumbtack or small sharp nail Directions: Poke lots of holes into the cardboard with a thumbtack or nail. Fill the glass with water until it is over-flowing. Press the cardboard over the top of the glass until water squishes through the holes. While still pressing the cardboard over the top of the glass, turn the glass upside down. Take away your hand. The cardboard sticks to … Continue reading Trap Water with Holes

Tippy Tap Hand Washer

http://teachers.egfi-k12.org/tippy-tap-hand-washer In this service-learning activity, student teams will learn the basic principles of fluid dynamics as well as how engineers improve society by designing a prototype system to pipe water from a storage tank to a simple hand-washing station called a Tippy Tap. These inexpensive, homemade devices are used extensively in the developing world, but because they must be manually refilled with water, they are of limited use in high-traffic areas. 2019.4.2 The students brainstormed, chose their first engineering design project and completed the pre-requisites on the engineering design process for the Tippy Tap Hand-Washer. Students have purposed that this … Continue reading Tippy Tap Hand Washer

Spy with a Periscope

Peek around corners without being seen. A periscope allows you to look almost anywhere while hiding behind walls, furniture, doors – wherever. To make a periscope you need: a one liter milk carton scissors two small rectangular purse-sized mirrors masking tape Directions: Cut the pointed end off the carton. Cut a 7 cm square from one side at the open end of the carton, near the top. Tape your cut out square to where the spout was to make a flat top. Tape a mirror inside the hole at a 45 degree angle, the reflective side facing the bottom of … Continue reading Spy with a Periscope

2019 wk.10

From video game to day job: How ‘SimCity’ inspired a generation of city planners – Los Angeles Times the games have introduced millions of players to the joys and frustrations of zoning, street grids and infrastructure funding — and influenced … Continue reading 2019 wk.10