que ventajas pra la vida del planeta tierra tiene que la densidad del hielo sea menor que la del agua

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

An unsaturated hydrocarbon is a hydrogen-carbon compound with a. a network solid structure b. single bonds c. single bonds in a branched-chain structure d. double or triple bonds

Which statement accurately represents the arrangement of electrons in bohr’s atomic model?