The existence of asteroids is supporting evidence of the solar nebula hypothesis, in that ________.
A. the gaps in the asteroid belt are created by the same process that creates gaps in Saturn's rings
B. the asteroids are probably fragments of a shattered planet
C. asteroids in the inner Solar System are small and rocky, while those in the outer Solar System are larger and have atmospheres
D. inner belt asteroids are richer in silicate and iron materials and contain fewer carbon-rich materials
Answer: D
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A mole of oxygen (O2 ) molecules and a mole of carbon dioxide (CO2 ) molecules at the same temperature and pressure have
A) the same number of atoms. B) different average kinetic energy per molecule. C) the same number of molecules. D) the same average molecular speeds. E) different volumes.
The center of mass of a system of particles (or objects) with total mass M moves like a single particle of mass M acted upon by the same net external force
Indicate whether the statement is true or false
How long does it take the Earth to complete one orbit around the Sun?
A) one year B) one day C) one month D) one week E) The time it takes Earth to orbit the Sun changes significantly from one orbit to the next.
In any particular place on Earth, certain constellations are visible in the evening only at certain times of the year because
A) our evening view of space depends on where Earth is located in its orbit around the Sun. B) during some times of year, some constellations drop below the southern horizon. C) some constellations are circumpolar. D) on any particular night, we can only see stars that are directly opposite (180 degrees away from) the Sun in the sky.