Chapter 7 Astronomy – Flashcards

-Heavily cratered ____ has long steep cliffs - Cloud penetrating radar revealed this twin-peaked volcano on___ - A portion of ___ surface appears without clouds - The ___ surface is heavily cratered in most places - ___ has features that look like dry river beds; note the impact craters

____: the creation of bowl-shaped impact craters by asteroids or comets striking a planet's surface ___: the eruption of motel rock or lava, from a planet's interior onto its surface ___: the disruption of a planet's surface by internal stress ____: The wearing down or building up of geological features by wind, ice, water and other phenomena of planetary weather

Craters are erased by time, geological factors such as ____ and ____

We can estimate the ____ age of any surface region from its number of impact craters, with more craters indicating an older surface

The _____ keeps Earth's surface much warmer than it would be otherwise, allowing water to stay liquid over most of the surface

The effect that certain atmospheric gases trapping in heat

The colors of planets: ___ colors from ammonia (NH3) ____ colors from methane (CH4)

Tectonics and volcanism both depend on internal heat and therefore depend on a planets___

____ is the only planet in our solar system to have plate tectonics

All of the following statements are true. Which one provides strong observational support for the claim that greenhouse gases make a planet warmer than it would be otherwise? Earth has a higher average temperature than Mars. Earth is the only planet with an ozone layer in its atmosphere. Mercury is much hotter than the Moon. Venus has a higher average temperature than Mercury.

Why does the increase of green house gases increase the temperature of a planet?

Earth's atmosphere contains only small amounts of carbon dioxide because chemical reactions with other gases destroyed the carbon dioxide and replaced it with the nitrogen that is in the atmosphere now. most of the carbon dioxide was lost during the age of bombardment. the earth's volcanoes did not outgas as much carbon dioxide as those on Venus and Mars. carbon dioxide dissolves in water, and most of it is now contained in the oceans and carbonate rocks. Earth doesn't have as strong a greenhouse effect as is present on Venus.

CO2 and H2O are

Which two geological processes appear to have been most important in shaping the present surface of Venus? tectonics and erosion volcanoes and erosion volcanoes and tectonics impacts and volcanoes impacts and tectonics

What is the importance of the carbon dioxide (CO2) cycle? It will prevent us from suffering any consequences from global warming. It regulates the carbon dioxide concentration of our atmosphere, keeping temperatures moderate. It allows for an ultraviolet-absorbing stratosphere. It makes the growth of continents possible.

What are the four characteristics that make a planet livable?

Human activity is rapidly ___ the atmospheric concentrations of green house gases, causing the overall global temperature to rise