Which phrases best describe tectonic plate movement? Check all that apply.
causes craters in Earth's surface
causes continents to move
causes some organisms to die
causes new species to develop
causes ice ages to begin

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