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Home Q & A Board Science-Related Homework Help Physics Astronomy
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ilan707 ilan707
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6 years ago
Some part of differentiation may have occurred very early in the first stage of planetary evolution as:
 
  A) the heat released by infalling matter melted the growing Earth.
  B) the heat released by radioactive decay melted the growing Earth.
  C) the heavy bombardment in the early Solar System cratered Earth.
  D) the heavy bombardment in the early Solar System formed giant basins.

Question 2

The Earth's core has a density of _____.
 
  A) 5.5 g/cm3
  B) 10.5 g/cm3
  C) 14 g/cm3
  D) 18.5 g/cm3

Question 3

_____ is the closest planet to the Sun.
 
  A) Earth
  B) Venus
  C) Mercury
  D) Mars

Question 4

Greenhouse gases are opaque to _____.
 
  A) infrared radiation
  B) visible light
  C) ultraviolet radiation
  D) microwaves

Question 5

The Moon has been unable to hold any atmosphere because:
 
  A) it has a low escape velocity.
  B) it cooled very slowly during its formation.
  C) its orbital velocity is higher than its escape velocity.
  D) its gravitational acceleration is more than 10 m/s2.
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sosobonsosobon
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6 years ago
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ilan707 Author
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#2
6 years ago
Thank you Jesus, my teacher is bad at explaining
wrote...
#3
6 years ago
Praise the LORD ha ha No worries
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