Describe how a metamorphic rock might become a sedimentary rock over time. a) metamorphic rock melts, cools, and undergoes recrystallization. b) metamorphic rock is intruded by igneous rock and it melts, cools, and becomes solid again. c) metamorphic rock undergoes weathering, erosion; the particles are deposited and undergo lithification. d) metamorphic rock is buried deep in the earth. it undergoes recrystallization and is then uplifted to the surface.

Some material consisting of a collection of microscopic objects is kept at a high temperature. a photon detector capable of detecting photon energies from infrared through ultraviolet observes photons emitted with energies of 0.3 ev, 0.5 ev, 0.8 ev, 2.0ev, 2.5ev, and 2.8ev. these are the only photon energies observed. (a) draw and label a possible energy-level diagram for one of the microscopic objects, which has four bound states. on the diagram, indicate the transitions corresponding to the emitted photons. explain briefly. (b) would a spring–mass model be a good model for these microscopic objects? why or why not? (c) the material is now cooled down to a very low temperature, and the photon detector stops detecting photon emissions. next, a beam of light with a continuous range of energies from infrared through ultraviolet shines on the material, and the photon detector observes the beam of light after it passes through the material. what photon energies in this beam of light are observed to be significantly reduced in intensity (“dark absorption lines”)? explain briefly.

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?