1. which was not a source of heat for early earth?\nasteroid and meteorite bombardment\ngravitational…

1. which was not a source of heat for early earth?\nasteroid and meteorite bombardment\ngravitational contraction\nhydrothermal energy\nradiation\n2. what process contributed to the formation of earths early atmosphere?\noutgassing\ndifferentiation

1. which was not a source of heat for early earth?\nasteroid and meteorite bombardment\ngravitational contraction\nhydrothermal energy\nradiation\n2. what process contributed to the formation of earths early atmosphere?\noutgassing\ndifferentiation

Answer

Brief Explanations:

  1. Asteroid and meteorite bombardment, gravitational contraction, and radiation were sources of heat for early Earth. Hydrothermal energy is a more recent - occurring source related to ocean - floor processes and was not a major heat source for early Earth.
  2. Outgassing is the process by which gases are released from the Earth's interior to the atmosphere, contributing to the formation of Earth's early atmosphere. Differentiation is the process of separating materials within the Earth by density and is not directly related to atmosphere formation.

Answer:

  1. hydrothermal energy
  2. outgassing