The presence of oxygen and ozone in Earth's atmosphere can be explained only through biology
Indicate whether the statement is true or false
TRUE
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Why didn't a planet form where the asteroid belt is now located?
A) Gravitational tugs from Jupiter prevented material from collecting together to form a planet. B) There was not enough material in this part of the solar nebula to form a planet. C) There was too much rocky material to form a terrestrial planet, but not enough gaseous material to form a jovian planet. D) The temperature in this portion of the solar nebula was just right to prevent rock from sticking together.
A supernova can occur when:
a) a massive star is on the Main Sequence b) the center of a 1 solar mass star stops burning Hydrogen in its core c) material from a companion star falls onto a white dwarf d) material from a red supergiant falls into a black hole e) a low mass star is on the Main Sequence
What are black dwarfs?
A) The lowest mass main sequence stars B) The end result of massive star evolution C) Objects that are not quite massive enough to be stars D) Pulsars that have slowed down and stopped spinning E) Cooled off white dwarfs that no longer glow visibly
The Apollo and Aten asteroids have orbits that:
A) cross the orbit of Earth at perihelion. B) cross the orbit of Mars, but not the Earth, at perihelion. C) remain between Mars and Jupiter, in the main belt. D) stay sixty degrees ahead of or behind Jupiter. E) stay out beyond Neptune.