Why does Earth have so little carbon dioxide in its atmosphere compared to Venus?
A) Earth has just as much carbon dioxide as Venus, but most of it is locked up in carbonate rocks rather than being free in the atmosphere.
B) Earth's volcanoes outgassed far less carbon dioxide than those on Venus.
C) Earth once had a lot of carbon dioxide, but it was lost to space during the heavy bombardment early in our solar system's history.
D) Chemical reactions turned Earth's carbon dioxide into nitrogen.
A) Earth has just as much carbon dioxide as Venus, but most of it is locked up in carbonate rocks rather than being free in the atmosphere.
You might also like to view...
What two things are unusual about the luminosity of the core of a Seyfert galaxy?
What will be an ideal response?
Which of the following objects are difficult to model as existing in large enough numbers to significantly explain the effects of "dark matter"?
A. cold white dwarfs B. planetesimal-sized objects C. black holes D. All of these choices are correct.
Which of the following is a consequence of the discovery of hot Jupiters for the nebular theory of solar system formation?
A) It has been discarded. B) It has been modified to allow for the formation of gas giants within the frost line. C) It has been modified to allow for planets to migrate inwards or outwards due to gravitational interactions. D) Its status is unclear and awaits further observations that will determine whether hot Jupiters are dense Earth like planets or gas giants. E) It remains unchanged as it only needs to explain our Solar System.
Two metal rods, one silver and the other gold, are attached to each other
The free end of the silver rod is connected to a steam chamber, with a temperature of 100°C, and the free end of the gold rod to an ice water bath, with a temperature of 0°C. The rods are 5.0 cm long and have a square cross-section, 2.0 cm on a side. What is the temperature at the point where the two rods are in contact with one another? The thermal conductivity of silver is 417 W/(m•K) and that of gold is 291 W/(m•K) No heat is exchanged between the rods and the surroundings, except at the ends. A) 39°C B) 41°C C) 47°C D) 53°C E) 59°C