Physics
Which statement best describes an igneous intrusion?

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

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Physics
Rainbow is due to

diffusion of sunlight through water droplets
ionisation of water deposits
absorption of sunlight in minute water droplets
refraction and reflection of sunlight by water droplets

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