GLOOP

1. GLOOP

2. Characteristics when borax added • The GLOOP becomes slimy but “stiffer” and then when you take it out if the cup it’s very bouncy and so you have to squish all the liquids out so it can dry off.

3. Effect with water • What kind of change was adding the water to the glue physical or chemical? How do you know? • BothPhysical because when the water is added to the glue, the two substances are physically mixed. How do you know? When the water evaporates, then the glue is left.

4. Explain • Give an Explanation why the properties changed. • The properties changed because when added the borax reacts with all the chemicals inside and forms a stiff and slimy substance.

5. Cross-Linking • What is another analogy that would be a good description of cross-linking ? • The borax and the water chemically ties together the long strands of polyvinyl acetate. This is a good answer to the previous question.

6. GLOOP history • he history of silly putty is quite amusing. In 1943 James Wright, an engineer, was attempting to create a synthetic rubber. • He was unable to achieve the properties he was looking for and put his creation (later to be called silly putty) on the shelf as a failure. • A few years later, a salesman for the Dow Corning Corporation was using the putty to entertain some customers. One of his customers became intrigued with the putty and saw that it had potential as a new toy. In 1957, • after being endorsed on the "Howdy Doody Show", silly putty became a toy fad. Recently new uses such as a grip strengthener and as an art medium have been developed. • Silly putt even went into space on the Apollo 8 mission.

7. Sources • http://www.chem.umn.edu/outreach/sillyputty.html • www.googleimages.com