terrestrial planets denser than jovian planets? A)
Only dense materials could condense in the inner solar nebula. B)
The Sun's gravity gathered dense materials into the inner solar system. C)
Gravity compresses terrestrial planets to a higher degree, making them denser. D)
Actually, the jovian planets are denser than the terrestrial planets. Answer:
Suppose you find a rock that contains 10 micrograms of radioactive potassium - 40, which has a half - life of 1. 25 billion years. By measuring the amount of its decay product (argon - 40) present in the rock, you conclude that there must have been 80 micrograms of potassium - 40 when the rock solidified. How old is the rock?
1.25 billion years
2.5 billion years
3.75 billion years
5.0 billion years
How do scientists determine the age of the solar system?
radiometric dating of Moon rocks
radiometric dating of the oldest Earth rocks
radiometric dating of meteorites
Theoretical calculations tell us how long it has taken the planets to evolve to their present forms.
The region of our solar system between Mercury and Mars has very few asteroids, while the region between Mars and Jupiter has many asteroids. Based on what you have learned, what is the most likely explanation for the lack of asteroids between Mercury and Mars?
There were very few planetary leftovers in this region, because most of the solid material was accreted by the terrestrial planets as the planets formed.
- Spring '12
- Solar System, solar nebula