PLEASE HELP ASAP Which tool first allowed scientists to develop a deeper understanding of planetary orbits?
radioscope
polarized lenses
X-ray spectrometers
telescope

On a geologic map, if the contacts between sedimentary rock units form a bull’s-eye pattern of concentric circles, with the youngest unit in the center, the underlying structure is a(n)

When electrons are added to the outermost shell of a carbon atom, it forms--an anion that has a larger anion that has a smaller cation that has a larger cation that has a smaller radius.

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created