QUESTION 1 A planet is most likely to have tectonic activity if it has O high in

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QUESTION 1 A planet is most likely to have tectonic activity if it has O high internal temperature. o a dense atmosphere. O low internal temperature. O low surface gravity. O high surface gravity. QUESTION 2 Approximately how deep is an impact crater compared to its width? @ 10-20% 100-20096 1-10% O 30-40% 50-10096 QUESTION 3 Considering just the effects of the carbon dioxide cycle, if the Earth were to warm up a bit, what would happen? O More evaporation and rainfall would reduce the atmospheric CO2 levels, and the greenhouse effect would weaken. O More evaporation and rainfall would increase the atmospheric CO2 levels, and the greenhouse effect would strengthen. Carbonate materials would form in the oceans more rapidly, the atmospheric CO2 content would decrease, and the greenhouse effect would strengthen O The ice caps would melt and cool the Earth back to its normal temperature O There would be a runaway greenhouse effect, with the Earth becoming ever hotter until the oceans evaporated (as may have happened on Venus). QUESTION 4 Earth's atmosphere contains only small amounts of carbon dioxide because the Earth's volcanoes did not outgas as much carbon dioxide as those on Venus and Mars. O chemical reactions with other gases destroyed the carbon dioxide and replaced it with the nitrogen that is in the atmosphere now O most of the carbon dioxide was lost during the age of bombardment. O carbon dioxide dissolves in water, and most of it is now contained in the oceans and carbonate rocks. O Earth doesn't have as strong a greenhouse effect as is present on Venus. QUESTION 5 How did the lunar maria form? The maria are the result of gradual erosion by micrometeorites striking the Moon. Volatiles escaping from the Moon's interior heated and eroded the surface in the regions of the maria. The giant impact that created the Moon left smooth areas that we call the maria The early bombardment created heat that melted the lunar surface in the regions of the maria Large impacts fractured the Moon's lithosphere, allowing lava to fill the impact basins. O

Explanation / Answer

1] Option high internal temperature is correct

2] Option 10-20% is correct

  An impact crater is an approximately circular depression in the surface of a planet, moon, or other solid body in the Solar System or elsewhere, formed by the hypervelocity impact of a smaller body.

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