Design Cycle and Glue Testing Concepts

Mrs. King Crosby guides second-graders through a lesson on evaluating and revising glue recipes. The lesson includes conducting strength tests, discussing results, and modifying recipes to meet design goals. Students learn to write new glue recipes and test them for specific properties, such as stickiness, strength, thickness, and clarity. The lesson emphasizes the engineering design cycle, encouraging students to test, learn, plan, and make improvements.

What is the primary goal of conducting strength tests on glue mixtures?

• To determine the color of the glue

• To check the glue's temperature

• To evaluate the glue's ability to hold weight

• To see how fast the glue dries

Why is it important to test each glue mixture in the same way?

• To ensure the tests are fair

• To save time

• To make the process more exciting

• To use up all the materials

What should you do if your glue does not meet all the design goals?

• Add more water

• Go back to the planning phase

• Use it anyway

• Throw it away

Which of the following is NOT one of the initial design goals for the glue?

• Sticky

• Strong

• Colorful

• Thick

What is the new design goal added for the glue recipe?

• Must be edible

• Must be fragrant

• Must be dry and clear

• Must be colorful

What is the purpose of using gelatin and cornstarch in the glue recipe?

• To make it edible

• To make it smell nice

• To improve stickiness and thickness

• To add color

What is the final step in the design cycle mentioned in the lesson?

• Test

• Learn

• Plan

• Make

What is the main activity in the final section of the lesson?

• Painting the glue

• Making a picture frame

• Cleaning up the materials

• Writing a report

Why is it important to reflect on the design cycle steps?

• To impress the teacher

• To fill time in the lesson

• To understand the process and improve designs

• To remember the steps for a test

What should you do after reading the instructions for making the glue?

• Skip to the next lesson

• Pause the video and conduct the test

• Ask a friend for help

• Start cleaning up