A) It is material left over from the interstellar cloud that never contracted with the rest of the gases to form the solar nebula.
B) It is made of planetesimals that formed beyond Neptune's orbit and never accreted to form a planet.
C) It consists of objects that fragmented from the protosun during a catastrophic collision early in the formation of the solar system.
D) It is made of planetesimals between the orbits of Mars and Jupiter that never formed into a planet.
E) It is made of planetesimals formed in the outer solar system that were flung into distant orbits by encounters with the jovian planets.
Correct Answer
verified
Correct Answer
verified
A) The water was mixed in the other materials in the planetesimals that accreted at our distance from the Sun.
B) The water was formed by chemical reactions among the minerals in the Earth's core.
C) The water was brought to the forming Earth by planetesimals that accreted beyond the orbit of Mars.
D) Earth formed in the relatively narrow region of the solar nebular in which liquid water was plentiful.
Correct Answer
verified
Correct Answer
verified
A) The Moon formed when two gigantic asteroids collided with one another.
B) The Moon originally was about the same size as Earth,but a giant impact blasted most of it away so that it ended up much smaller than Earth.
C) The Moon formed from material blasted out of the Earth's mantle and crust by the impact of a Mars-size object.
D) The Moon formed just like Earth,from accretion in the solar nebula.
Correct Answer
verified
Correct Answer
verified
A) radiometric dating of Moon rocks
B) radiometric dating of the oldest Earth rocks
C) radiometric dating of meteorites
D) Theoretical calculations tell us how long it has taken the planets to evolve to their present forms.
Correct Answer
verified
Correct Answer
verified
A) the law of conservation of angular momentum
B) the law of conservation of energy
C) the law of universal gravitation
D) Einstein's law E = mc²
Correct Answer
verified
Correct Answer
verified
Correct Answer
verified
Correct Answer
verified
A) rocks
B) metals
C) silicon-based minerals
D) hydrogen compounds
E) molecules such as methane and ammonia
Correct Answer
verified
Correct Answer
verified
A) light gases (H,He) ,hydrogen compounds (H₂O,CH₄,NH₃) ,rocks,metals
B) hydrogen compounds (H₂O,CH₄,NH₃) ,light gases (H,He) ,rocks,metals
C) light gases (H,He) ,hydrogen compounds (H₂O,CH₄,NH₃) ,metals,rocks
D) hydrogen compounds (H₂O,CH₄,NH₃) ,light gases (H,He) ,metals,rocks
E) hydrogen compounds (H₂O,CH₄,NH₃) ,rocks,metals,light gases (H,He)
Correct Answer
verified
Correct Answer
verified
A) a collapsing nebula of gas
B) flattened,spinning disks
C) jovian planets
D) asteroids
E) strong stellar winds
Correct Answer
verified
Correct Answer
verified
A) the shattered remains of collisions between planets
B) chunks of rock or ice that condensed after the planets and moons finished forming
C) chunks of rock or ice that were expelled from planets by volcanoes
D) leftover planetesimals that never accreted into planets
Correct Answer
verified
Correct Answer
verified
A) the oldest Earth rocks.
B) the oldest rocks on the Moon.
C) the oldest meteorites.
D) the atmosphere of Mars.
E) It hasn't been done yet,but the age of the solar system could be obtained from a sample of Io's surface.
Correct Answer
verified
Correct Answer
verified
A) the formation of the Moon
B) the large metallic core of Mercury
C) the backward rotation of Venus
D) the extreme axis tilt of Uranus
E) the orbit of Triton in the opposite direction to Neptune's rotation
Correct Answer
verified
Correct Answer
verified
A) Computer simulations show that the Moon could really have formed in this way.
B) The composition of the Moon is similar to that of Earth's outer layers.
C) The Moon is depleted of easily vaporized materials,as we would expect from the heat of an impact.
D) Scientists have found several meteorites that appear to be the remains of the object that caused the giant impact.
E) We see signatures of giant impacts on other planets.
Correct Answer
verified
Correct Answer
verified
A) hydrogen and helium
B) rock
C) metal
D) hydrogen compounds
Correct Answer
verified
Correct Answer
verified
A) As the growing jovian planets captured gas from the solar nebula,the gas formed swirling disks around them,and moons formed from condensation accretion within these disks.
B) Because of their strong gravity,the jovian planets were able to capture numerous asteroids that happened to be passing nearby,and these became the major moons of the jovian planets.
C) The large moons of the jovian planets originally formed in the inner solar system and these moons then migrated out to join up with the jovian planets.
D) The many moons of the jovian planets remains one of the unexplained mysteries of the formation of our solar system.
Correct Answer
verified
Correct Answer
verified
Correct Answer
verified
The minerals in rocks contain small amou...View Answer
Correct Answer
verified
View Answer
Correct Answer
verified
Correct Answer
verified
Correct Answer
verified
Correct Answer
verified
A) Only dense materials could condense in the inner solar nebula.
B) The Sun's gravity gathered dense materials into the inner solar system.
C) Gravity compresses terrestrial planets to a higher degree,making them denser.
D) Actually,the jovian planets are denser than the terrestrial planets.
Correct Answer
verified
Correct Answer
verified
A) in the inner solar system
B) far beyond the orbit of Pluto
C) in the region of the jovian planets
D) in the asteroid belt
Correct Answer
verified
Correct Answer
verified
Showing 61 - 80 of 89
Related Exams