Some light bulbs tend to emit more blue, some are more yellowish or reddish, but you can't always tell just by looking. I'm particularly interested in finding out how much blue light certain light bulbs I have produce.
Metamorphic rocks form from heat and pressure changing the original or parent rock into a completely new rock. The parent rock can be either sedimentary, igneous, or even another metamorphic rock. ... This changing of rock types is called the "Rock Cycle".
