What type of rocks form when pieces of rocks, minerals and remains of living things become solid?
a igneous
b extrusive
c metamorphic
d sedimentary

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: