FREE POINTS. Since someone took all my answers and deleted them.

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

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?

Why are people not able to skip a dive to the deepest part of the ocean