PRETEST
ections: Write the letter of the correct answer on a separate sheet of paper.
1. How is heat produced?
A. by gravity that pulls on atoms and molecules
B. by vibrations between two or more atoms and molecules
C. by matter and force that cause the atoms and molecules to
flow freely
D. by matter and energy that cause the atoms and molecules to
be always in motion
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Answer:
D
Explanation:
d because it's cause if energy atoms and molecules in motion