Jupiter is noticeably oblate (flattened) because of which of the following physi

Question

Jupiter is noticeably oblate (flattened) because of which of the following physical effects? It rotates rapidly. It has a strong magnetic field. Its moons distort its surface. It has powerful gravity. Colliding comets pile up near its equator. Which of the following is correct regarding the evolution of the atmospheres of Earth and Venus? The atmospheres were quite different from each other since their formation, and have continued to be different. Venus's atmosphere has not changed, but Earth's has evolved a lot. Both have basically the same atmospheres they started with. Earth's atmosphere has not changed, but Venus's has evolved a lot. They started with about the same composition but have since evolved to their present very different states. What is the reason that only large impact craters, with sizes greater than 3 km across, appear on the surface of Venus? Venus's surface solidified after most of the smaller meteoroids and asteroids had been accreted by planets. Volcanic activity obliterates the smaller craters, leaving the larger ones intact. Small meteoroids cannot penetrate the atmosphere, so craters are left only by ones large enough to get through. Erosion obliterates the smaller craters, leaving the larger ones intact. Sulfuric acid rain on Venus corrodes and obliterates the smaller craters.

Explanation / Answer

19. Jupiter is noticeably oblate(flattened) becaouse of its rapidly rotation and Jupiter is made by gas it is not rigid, this is the another reason of its oblate shape. we can see that earth having low velocity of spinning thats why its less oblate than Jupiter while Saturen spinning with the high velocity on its axis thats why it is more oblate than Jupiter.

so the right anser of this question is first option- It rotates rapidly.

20. early atmosphere of earth and venmus was quite similiar they boith had a more carbon di oxide and water vapor in their environment but after some time they evolved with a different way. venus's environment evolved rapidly first than too slow while earth's atmosphere evolved with a quite similiar rate thats why they having a different atmosphere from each other in present.

so the right option for the question is last one which is -

" They started with about the same composition but have since evolved to their present very different state.

21. venus atmosphere is comnposed mainly by the carbon dioxide which makes venus's atmosphere more dense because carbon dioxide is a heavy gas. venus atmosphere is too dense in comparison to the earth. because of this density of the atmosphere small meteoroids are not able to reach to the surface, only large meteoroids reached the surface thats why venus's surface having only large craters

so the right option is third one-

"small meteoroids can not panetrate the atmosphere, so craters are left only by ones larger enough to get through":

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