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Most common elements in the universe
What do you mean by jovian planets?
Umbra and penumbra.
What are the three principal sources of the internal heat of terrestrial planets?
A) conduction, differentiation, and accretion.
B) accretion, differentiation, and radioactivity.
C) accretion, differentiation, and eruption.
D) convection, differentiation, and eruption
The most metal-rich terrestrial planet is
In what range of masses are most stars found?
A. 0.1 to 5 Solar masses
B. 0.0001 to 20 Solar masses
C. 0.1 to 100 Solar masses
D. 0.001 to 10 Solar masses
In terms of heart disease risk, which of the following is true?
A. As LDL cholesterol levels increase there is a decreased risk.
B. As HDL cholesterol levels increase there is an increased risk.
C. As LDL cholesterol levels increase there is an increased risk.
D. As HDL cholesterol levels decrease there is a decreased risk
Earth is made mostly of metals and rocks. Where did this material come from?
Most of the mass of the milky way seems to exist in the form of
The nucleus of an active galaxy contains several components. Explain.
The jovian moon with the most geologically active surface is
Which one of the following is not one of the four major features of the solar system?
a. Planets fall into two major categories (terrestrial and jovian).
b. Large bodies in the solar system have orderly motions.
c. Several exceptions to the general trends stand out.
d. Swarms of asteroids and comets populate the solar system.
e. The solar system contains eight planets plus dwarf planets (such as Ceres, Pluto, and Eris).
Which statement must be true in order for a rocket to travel from earth to another planet?
The globular cluster m13 belongs to the ............of the milky way galaxy.