Why am i not good enough :,(

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?

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?