Some part of differentiation may have occurred very early in the first stage of planetary evolution as:
A) the heat released by infalling matter melted the growing Earth.
B) the heat released by radioactive decay melted the growing Earth.
C) the heavy bombardment in the early Solar System cratered Earth.
D) the heavy bombardment in the early Solar System formed giant basins.
A
You might also like to view...
The thermal conductivity of aluminum is 238 W / m •°C and of copper is 397 W / m •°C. A rod of each material is used as a heat conductor. If the rods have the same geometry and are used between the same temperature differences for the same time interval, what is the ratio of the heat transferred by the aluminum to the heat transferred by the copper?
a. 0.599 c. 0.359 b. 1.67 d. 2.78
When an ice cube in a glass of water melts, the water level will
1) rise. 2) fall. 3) remain the same. If the floating ice cube contains a chunk of iron, during melting the water level will 4) rise. 5) fall. 6) remain the same.
The element carbon, so important to life, was formed in the earliest nebulae of the Universe and thus became a component of all protostars.
a. true b. false
The downslope movement of soil and rock under the influence of gravity is known, in general, as ______________
Fill in the blank(s) with correct word