All of space and the matter in it is ?

What is the correct term for living the most sustainable life you can within your current circumstances?

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 type of matter is made of only one kind of atom