In the late 1800s, Kelvin and Helmholtz suggested that the Sun ...

[mpobi80]

In the late 1800s, Kelvin and Helmholtz suggested that the Sun stayed hot due to gravitational contraction. What was the major drawback to this idea?
 
  A) It predicted that the Sun would shrink noticeably as we watched it, but the Sun appears to be stable in size.
  B) It is physically impossible to generate heat simply by making a star shrink in size.
  C) It predicted that the Sun could shine for about 25 million years, but geologists had already found that Earth is much older than this.
  D) It predicted that Earth would also shrink in size with time, which would make it impossible to have stable geology on our planet.

Question 2

While it has some high volcanoes, most of Venus is relatively ________ in elevation.
 
  Fill in the blank(s) with correct word

[apple]

Answer to Question 1

C

Answer to Question 2

low

[mpobi80]

Thanks for the timely response, appreciate it

[covalentbond]

Excellent