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# GOOP

 Activity Name: GOOP How long did it take? 1 hr. Materials:

Vocabulary to know about for this activity:

Viscosity - how much a fluid resists flowing (high  = thick, low = thin)

Newtonian Fluid - viscosity stays the same (flow is directly proportional to pressure)

Non-Newtonian Fluid

Background/Things to know about for this activity:

Preparation (what should one do to prepare)::

Procedure (how to go about the activity):

How can the EDP or engineering design practices be incorporated into this activity?

Comment: In the comment field please comment of how this activity went for you, how long it took, how long you expected it to take, if there were any other materials that you would have wanted to have, how your was teacher involved in this activity, if it was age/grade level appropriate for the students and any other comments about this activity you think are important for the next person to use this activity to know.

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## 1 Comment

1. Ms. Burn's 4th grade class, Healey school, Fall 2012

This activity is  a good, quick activity for students.

Preparation:
We pre-packaged corn-starch into ziploc bags and gave each pair of students a cup of water and a dropper. We also prepared a sample "GOOP" in a plastic bag that we passed around so the students can see how the mixture is supposed to look/feel.

Activity:
We spent a few minutes explaining the vocabulary and the activity. We asked the kids to keep track of the number of drops they placed. We also asked them to be careful with adding water so that they do not add too much all at once. After students were done, we took a tally of the number of drops it took for the students to create their GOOP. Some students misunderstood what we meant by "drops" so we ended up with a huge range.

Overall, we think the activity went well. Some students finished very early and were bored after the activity and in this case, having little time was probably to our advantage. We could have clarified more what we meant by "drops" and possibly thought of a follow up activity for the students who finished early.