Extreme+Phase+Changes+-+Updated

Dorothy Alf, 2012

Extreme Phase Changes (or 'Cryogens & You!'), done in an 8th grade classroom during 1 class period.

1) To show the students some of the more extreme examples of solids and liquids, and how they can be useful in research. 2) For the students to start to think about safety in handling substances and to think about where cryogens could be useful.
 * Purpose **

Students will already have prior knowledge of phase changes and some substances, so the lesson will focus on the more “extreme” ones used in research at Northwestern University or other areas. We will discuss these substances in general, with real examples in front of the students (liquid nitrogen, dry ice) so we will talk them through why they are used and think about some of the advantages and disadvantages for using them. At the end for fun and a special treat, we will make liquid nitrogen ice cream!
 * Overview **

Lesson Plan: [|phase change lesson plan_v3.docx(1).doc]

Accompanying Worksheet: [|phase change lesson worksheet_v2(1).docx]

Need to add a link to the video and photos of the lab that Dorothy created.