Assess two situations in which it is important to question scientific issues in the media.

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?

What is the percentage of hydrogen in nitrogen trihydride

An alpha particle is: a hydrogen atom a nucleus of helium two neutrons an electron