linerwars.blogg.se - Age of water fountains

As a class, discuss the student reflection questions.Teams may trade unlimited materials with other teams to develop their ideal parts list. They agree on materials they will need, write/draw their plan, and present their plan to the class. Students meet and develop a plan for their water fountain.If they are struggling, ask questions that will lead them to a solution quicker. (Give students regular “time checks” so they stay on task. Use a timer or an on-line stopwatch (count down feature) to ensure you keep on time.Announce the amount of time they have to design and build (1 hour recommended).Explain that students must design and build a water fountain that is both functional and creative.Provide each team with their materials.Provide a demonstration of a Hydraulic Pump (See Testing Materials and Process Section for build instructions).Review the Engineering Design Process, Design Challenge, Criteria, Constraints and Materials.Give an overview of Pascal’s Principle and Hydraulics using

Ask students what kinds of water fountains they have seen and where they have seen them.

Discuss the topics in the Background Concepts Section.

Hand out the Water Fountain worksheet, as well as some sheets of paper for sketching designs.

If you want to decrease the complexity, fix one or more variables. The size of the small and large bottles, the size and height of the connecting tube, the amount of pressure exerted, and the location and pattern of holes/tubes for the fountain.

NOTE: There are many variables that increase the complexity of this challenge.

Simply show the basic set up and have the students create their own innovative designs.

Fountain: To keep the lesson as open-ended as possible, don’t add a fountain design into your demo.

(if your hand is too big to fit into the small bottle, attach a wooden skewer into the puck and use it as a handle).

Push the puck down into the smaller bottle.

As soon as the water is applied to the smaller bottle use the puck to exert pressure. Combine about 6 cardboard circles by covering the group of them with waterproof tape. Measure the diameter of your smallest bottle and cut out corrugated cardboard circles slightly smaller for the puck.

To help apply the pressure, create a “waterproof puck” out of cardboard.

Pressure: The smaller bottle is the bottle you will add the water to and then apply the pressure.

Test to make sure the seals are working and that there are no leaks. Seal: Use waterproof tape to seal around the tube where it connects to each bottle.Place the basic set up into a flat tub for testing.Cutting the holes for the tube requires an X-acto knife. Connect the two bottles with a clear plastic tube (diameter is a variable).Use two empty soda bottles – one smaller than the other (sizes are a variable).You will need to build a hydraulic pump for a classroom demonstration. Test each team’s design by having the students demonstrate how their water fountain works using water and the plastic tub.