Sagot :
What may have caused Mercury to have a large metallic core and a relatively thin crust? a b. a large impact tidal coupling with the Sun solar wind clearing the nebula c. d. a slow orbital period a long period of flooding e. 19. Which is the oldest geological feature of Mercury? a b. C. smooth plains jumbled terrain intercrater plains lobate scarps rilles d. e. 20. The Moon's rotations per revolution is 1:1. Mercury's is a. 1:1 b. 2:1 c. 2:3 d. 3:2 e. 12 21. Which is a unique characteristic of Venus not shared by the other Terrestrial pianets? a . b. c. The planet has an atmosphere. The planet has volcanoes on its surface. The planet experiences retrograde rotation The planet has a strong magnetic field. The planet once had water on its surface. d. e. 22. Which is a characteristic Venus shares with Earth? a. b. Both planets have an ozone layer within their atmospheres. Both planets rotate clockwise on their axes. Both planets have a uniform circulation within their atmospheres. c. d. Both planets are still geologically active e Both planets have heavily cratered surfaces.