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Answer Key
Grade 7 Science: Forces, Motion & Newton's Laws Intro
1.
force
2.
Net
3.
unbalanced/net
4.
Inertia
5.
acceleration
6.
reaction
7.
motion
8.
center
9.
combined effect of all forces acting on an object
10.
object keeps its motion unless unbalanced force acts
11.
tendency of objects to resist changes in motion
12.
rocket pushes gas down, gas pushes rocket up (answers vary)
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