The age of the solar system is believed to be approximately 4.6 billion years based on the data from
a. samples of lunar rocks.
b. samples of Earth rocks.
c. samples of meteorites.
d. samples of lunar rocks, Earth rocks, and meteorites.
e. None of the other choices are correct.
Question 2
A(n) ____________ is a solar-system object that enters Earth's atmosphere and becomes very hot due to friction between the object and Earth's atmosphere and does not survive to reach the surface.
a. asteroid
b. meteor
c. comet
d. meteoroid
e. planetesimal