A star's motion across the sky is its ________ motion. Fill in ...

[armygirl]

A star's motion across the sky is its ________ motion.
 
  Fill in the blank(s) with correct word

Question 2

Which of the following best describes why the smaller terrestrial worlds have cooler interiors than the larger ones?
 
  A) They were cooler when they formed.
  B) The smaller ones are farther from the Sun.
  C) They have relatively fewer radioactive elements.
  D) They have relatively more surface area compared to their volumes.
  E) They had more volcanic eruptions in the past, which released their internal heat.

[huda]

Answer to Question 1

proper

Answer to Question 2

D