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Particle Model of Matter and States
Worksheet
Grade Level
Grade 7
7.74 Particle Model of Matter and States
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A substance cools from gas to solid without becoming liquid first. Which combination of model features is correct?
A
Energy is removed, particles slow down, spacing decreases greatly, and fixed positions form.
B
Energy is added, particles move faster, and spacing increases.
C
The particles become liquid before the solid appears.
D
Particle identity changes completely during the process.
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