Given that all bodies in the solar system should have suffered equally from collisions during the period of early bombardment, if we find a body with relatively few craters on its surface we deduce that
A) the surface of the body is made of material that produces fewer impact craters
B) the body must have been located in a region of the solar system that for some reason suffered fewer collisions
C) the body must have formed after the period of early bombardment
D) geological activity or other processes must have removed older craters resulting in a younger, smoother surface
Question 2
A common way a robotic spacecraft can be accelerated and have its trajectory changed without the use of any fuel is via
A) a gravitational slingshot from another spacecraft
B) radiation pressure from the Sun
C) the ejection of mass from the probe
D) a gravitational slingshot from another planet
nervous system
The Major Divisions of the Peripheral Nervous System
The Olfactory System
The hypothalamic-pituitary portal system.
Layout of the Nervous System
Components of the Lymphatic System