PLS HELP WILL MARK BRAINLIEST Obsidian .

is formed from sand and quartz
cools very quickly
has large mineral crystals
cools very slowly

What is the full meaning of rfid on computer

[ou.01]which of these is the most likely use of an electromagnetic wave which has wavelength shorter than microwaves but longer than visible light? o heat food safely o neat food safely o take images of bones and teeth o transmit radio and cellular phone signals o take images of bones and teeth o transmit radio and cellular phone signals o detect the location of objects which emit heat

Which of the following is true of all geographic locations on earth?