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1. Accounting for All the Energy<br />

There should be enough forms to account for<br />

all the energy in the scenario being analyzed.<br />

TEACHER DISCOURSE:<br />

Teachers frequently applied<br />

this criterion successfully:<br />

During Energy Theater for a basketball rolling on<br />

the ground, teachers postulated the existence of<br />

thermal energy to account for lost kinetic energy,<br />

even though they could not detect a temperature<br />

change.<br />

9

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