HPQ:PHYSICS:KS3:HEATING AND COOLING:CLAIRE PHILLIPS

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Heating and cooling

Stimulus: “exact same” volume of propanone in two sealed test tubes (labeled now + one week ago). If you can set this up in advance this would be better.

QUESTION. Which sentence best describes what is going on?

mso-bidi-font-family:Calibri">  A.   

The test tube weighs less now because some of the propanone disappeared.

mso-bidi-font-family:Calibri">  B.   

The test tube has the same mass because the propanone particles have turned into a gas.

mso-bidi-font-family:Calibri">  C.    

The propanone volume shrank because the particles got closer together.

mso-bidi-font-family:Calibri">  D.   

The test tube weighs less now because some of the propanone is a gas.

ANSWER: B

Activities:

B) Science Questioners: students have to listen to other groups and ask only questions to help guide the groups learning.

A+D) Weigh the test tubes, and open test tube to smell.

C) review rules of liquid particle diagrams (liquids cant compress)