Physics
The light rays used for eliminating bacteria

Ultra-violet radiation
X-rays
Microwave radiation
Infrared rays

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Physics
Which statement best describes an igneous intrusion?

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

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