Discuss the fate of meteoroids upon entering the atmosphere of Venus. How do the impact craters found on the surface support this idea? How are the numbers of impact craters affected by volcanism?
What will be an ideal response?
All small meteoroids burn up in the thick atmosphere. Only large ones reach the surface. Thus, there are no small impact craters, only large ones. Also, the heavy volcanic activity continuously changes the surface, covering up older impact craters, so that there are few impact craters compared to the Moon or Mercury.
You might also like to view...
A square conducting loop is situated such that it is vertical, in the x-z plane. The earth’s gravitational field points downward (in the –z direction). The loop is dropped, and maintains its orientation in the x-z plane. A magnetic field pointing in the +y direction exists and is uniform with respect to time, but varies as a function of z: B(z)=Bo (10m-z). The loop is dropped and allowed to fall under the influence of gravitation. You observe the loop from the +y direction. Which of the following occurs?
A. The situation is unclear because we do not know the initial conditions. B. There is a clockwise induced current. C. There is a counter-clockwise induced current. D. There is no induced current.
Mercury and the Moon do not have atmospheres because
A) their surfaces are so cold that any atmospheric gases freeze out onto their surfaces B) charged particles from the Sun have stripped away their atmospheres C) they are rotating too rapidly, causing their atmospheres to be thrown out into space D) their gravities are too weak to prevent atmospheric gases escaping into space
Which two continents are the most obvious pieces in the continental jigsaw puzzle of plate tectonics? Why?
What will be an ideal response?
Germanium, Ge (number 32), computer chips operate faster than silicon, Si (number 14), computer chips. So how might a gallium, Ga (number 31), chip compare with a germanium chip?
A) A gallium chip would be even faster because the gallium is more metallic. B) A gallium chip would be slower because its electrons are more loosely held. C) Gallium is located just below aluminum, which is widely known to be an electrical insulator. D) Gallium is more nonmetallic and so it does not conduct electrons very well.