Physics
Which statement best describes an igneous intrusion?

Magma explodes to the surface and forms a smooth outer layer of rock
Igneous intrusion for when ice crystals splash into lava
Magma is exported to an open area and forms iron
Magma is injected into surrounding rock forming an igneous intrusive

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Physics
Acceleration is

Directly proportional to mass
Inversely proportional to force
Inversely proportional to mass
Directly proportional to force

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