Which is true about visible light? A. It travels fastest through a medium, such as water or air.
B. It is the only part of the electromagnetic spectrum that
we can see.
C. It cannot travel through a vacuum.

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

What problem would a person most likely have if her kidney did not work correctly?