What igneous rock is mafic, vesicular, extrusive?

Barbara is converting 78°f to degrees celsius. first, she subtracts 32 from 78. what is the next step?

“in 1492 columbus sailed the ocean blue” is an example of: a)explicit memory b) procedural memory c) semantic memory d)episodic memory

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