Kathy

A) Neptune rotates quite rapidly (16 hours), whereas Uranus rotates very slowly (243 days).

B) A number of storms and ice clouds are visible in Neptune's atmosphere, whereas Uranus's

atmosphere appears almost featureless.

C) Neptune is circled by a system of narrow, dark rings, whereas the rings of Uranus are

wide, like those of Saturn.

D) Neptune's magnetic axis is closely aligned with its rotation axis, whereas for Uranus the

two axes are at a large angle to each other.

A) in tectonic plate motion.

B) when an impactor struck the body and remained embedded.

C) in a powerful internal explosion that occurred early in Miranda's history.

D) when large blocks of ice and rock were lifted off the surface in an impact and settled back

A) rocky core overlaid by a thick mantle of liquid hydrogen, relatively thin gaseous

atmosphere

B) small rocky core overlaid by a thin mantle of liquid hydrogen, thick gaseous atmosphere

C) large rocky core with a thin mantle of liquid hydrogen, thin gaseous atmosphere

D) rocky core, liquid hydrogen mantle, and gaseous atmosphere, all having about the same

thickness

A) 1000 times more massive

B) It already generates energy by nuclear fusion.

C) only about twice as massive; it is almost a star

D) 75 times more massive

I'm supposed to consider the areas most affected (Southern California, Western Texas) and how they differ in respect to weather, geography and climate. I also have to consider which water resource would be "easier to replenish."

I'd really appreciate anything you could tell me!!

A) around stars in the disk of our Galaxy.

B) in globular clusters.

C) near the center of our Galaxy.

D) outside our Galaxy.

A) roughly the mass of Jupiter up to a few times Jupiter's mass

B) a few times the mass of Earth

C) quite large—between 10 and 100 times Jupiter's mass

D) very small—between one-tenth and a few tenths of the mass of Earth

A) We use Newton's law of gravity, using the measured distance of the planet from

its star and the planet's gravitational pull on the star.

B) We measure the change in the brightness of a distant star that the planet causes by

microlensing.

C) We use spectra to measure the planet's temperature and photometry to measure its

brightness.

D) We measure the planet's angular diameter and hence its size and then use spectra

to find its composition and hence density.

A) around burned-out remnants of stars.

B) around stars in the disks of other galaxies.

C) in globular clusters.

D) around stars in the disk of our Galaxy.

A) looking for tiny variations in the star's position in the sky, caused by the

gravitational pull of one or more planets orbiting the star

B) looking for tiny variations in the star's radial velocity, caused by the gravitational

pull of one or more planets orbiting the star

C) looking for excess infrared radiation from the star, caused by the presence of

planets that are cool and thus emitting primarily in the infrared

D) using space-based telescopes to search for tiny pinpoints of light that follow

circular or elliptical paths around the star

A) faint pinpoints of light slowly circling some stars, as seen through the new 8- and

10-meter telescopes

B) slightly wavy path of a star through space, as if the star were being tugged by an

orbiting planet

C) cyclic Doppler shift variations in the spectra of several stars

D) warped disks of dust and gas around some young stars

A) These bodies were part of the original solar nebula. Because they are so far from the rest

of the solar system, these regions were undisturbed by the creation of the planets, and

these objects have remained there ever since.

B) These distant objects have been captured from interstellar space by the Sun’s

gravitational pull.

C) The gravitational forces from Jupiter and Saturn flung planetesimals from regions closer

to the Sun out into these regions.

D) Early in the history of the solar system, it is believed that these objects were pulled out of

the Sun by a close encounter with a passing star.

A) our bodies have converted the original hydrogen and helium into heavier elements.

B) the Big Bang model of the universe must be wrong.

C) the solar system did not form directly from the material created by the Big Bang.

D) the Big Bang created elements unevenly because the Sun, unlike our bodies, is mostly

hydrogen and helium

A) one centimeter.

B) half a meter.

C) half a kilometer.

D) 50 kilometers.

Sun: spherical, solid surfaces;

mean densities about four times that of water; radii about 4000 km; low-density

atmospheres. How would these planets be classified in comparison with our solar

system?

A) terrestrial planets

B) Jovian planets

C) cometary nuclei

D) asteroids

from outer space at a speed of 4 × 105

km/ s–1

. What conclusion

can we draw from this report?

A) He made an error in his experiment because such a speed is considered to be impossible

by all previous experiments.

B) This “particle” must have been a photon or quantum of electromagnetic radiation of very

high energy in order to have been traveling this fast.

C) This result is acceptable since atomic particles can travel this fast, whereas larger bodies

are limited to 3 × 105 m/s–1

.

D) This is an acceptable result for a particle originating from outer space because particle

speed from such regions is unlimited.

following characteristics of electron orbits

is shared with planetary orbits. Which one?

A) Larger orbits are associated with higher energies.

B) The particle motions must be described by quantum mechanics.

C) Only certain allowed orbits exist with certain allowed energies and allowed distances.

D) The orbiting particles exhibit both particle and wave properties.

A) protons but a different number of neutrons.

B) protons but a different number of electrons.

C) protons and neutrons, but they are arranged differently in the nucleus.

D) neutrons but a different number of protons.

A) a cooler layer of gas overlying the hot solar surface, which contains many elements,

including hydrogen, helium, magnesium, calcium, and iron.

B) a cooler layer overlying the hot solar surface, consisting solely of hydrogen gas, which

produces all the absorption lines.

C) absorption by atoms and molecules in the Earth's cool atmosphere.

D) a hotter layer of gas that overlies the cooler solar surface and produces the absorption

lines.