Complete the mcq:
Planets
1 The origin of the Moon is
a. a complete mystery to scientists
b. the result of an ancient collision between Earth and another large body
c. cannot be adequately hypothesized without more expeditions to the Moon
d. the same as the origin of the Earth.
2 The magnetic field of a planet depends on its
a. composition, size, internal temperature, and rotational period
b. it's age and distance from the sun
c. surface temperature and it's topology
d. orbital speed and the inclination of the planets rotational axis from the orbital plane
3 Which is the most accurate relationship with respect to magnitude of Surface Erosion:
a. Moon has most, Mars next, Earth the least
b. Earth has most, and Mars and the Moon have the same amount of erosion
c. Earth has most, followed by Mars, and the Moon has the least
d. Mercury has the most, followed by the Moon, and Mars has the least
4 Which of the following Planet's does not have a ring
a. Jupiter
b. Uranus
c. Neptune
d. Venus
5 Comets are
a. made of Metallic rocks and glow due to their radioactivity
b. made of Ice and Rocks and usually follow an elliptical orbit around the Sun
c. degenerate asteroids that can spread disease if they pass close to Earth
d. stable spherical objects that glow as they get close to the Sun due to their evaporation and subsequent ionization.
6 The escape velocity from the Earth is 25,000 Miles per hour. What is the escape velocity from a planet that had the same radius as Earth but an overall density 50% higher than Earth?
a. 12,500 Miles per Hour
b. 50,000 Miles per Hour
c. Cannot be determined with the information given
d. 30,618 Miles per Hour