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.
The main cause is nearness to water
UV radiation generates ground-level ozone (O3) and some particulate matter (PM, frequently called aerosol) that include nitrate, sulfate, and organic aerosols causing adverse effect on human health and the environment. UV promotes the formation of hydroxyl radicals that act as cleaning agents for troposphere
Radiation has been around us throughout our evolution. So our bodies are designed to deal with the low levels we're exposed to every day. But too much radiation can damage tissues by changing cell structure and damaging DNA. This can cause serious health problems, including cancer
Physical features are used to determine relative age in a few ways. For instance when you notice, worn, stretched out skin you may assume that the person is in the upper side of the age scale. On the other hand if you notice softer, clearer skin you may assume that the person is on the lower side of the spectrum.
Hope I helped,
-CSX :)
