Q&A Hero

Physic

Q: The Sun's energy is generated from the fusion of A) uranium to form lead, Pb. B) helium nuclei to form carbon nuclei. C) hydrogen nuclei to form helium nuclei. D) carbon nuclei to form magnesium nuclei.
Q: The temperature of the Sun's interior is estimated to be about how many kelvins? A) 1500 B) 15 million C) 5 billion D) 60,000
Q: It is nottrue that the neutrino A) is an elementary particle. B) interacts extensively with other particles. C) has no electric charge. D) travels at or near the speed of light.
Q: Patches of cooler material on the Sun's surface are called A) flares. B) prominences. C) cool spots. D) sunspots.
Q: The Sun's photosphere is, by mass, about 25% A) helium. B) carbon. C) hydrogen. D) oxygen.
Q: The Sun's photosphere is, by mass, about 75% A) helium. B) carbon. C) hydrogen. D) oxygen.
Q: The Sun is A) a self-luminous sphere. B) energized by nuclear fusion. C) a plasma. D) all of the above.
Q: By definition, the universe consists of A) all energy only. B) all space only. C) all matter only. D) all of the above.
Q: An extremely large collection of stars bound together by gravitational attraction and occupying a huge volume of space is called a _______________. A) planetary nebula B) solar system C) universe D) galaxy
Q: Clusters containing clusters of galaxies are called _______________. A) superclusters B) galactic clusters C) universe clusters D) quasar clusters
Q: The cluster of galaxies that includes our Milky Way is called the _______________. A) Local Group B) universe C) solar system D) Milky Cluster
Q: The letters LMC refer to the galaxy named _______________. A) Light Magellanic Collection B) Large Magellanic Collection C) Large Magellanic Cloud D) Light Magellanic Cloud
Q: Our home galaxy is called _______________. A) M31 B) the solar system C) the Milky Way D) Andromeda
Q: Another name for a pulsar is _______________. A) neutron star B) black hole C) quasar D) red giant
Q: A Type II supernova can form a _______________ or a black hole. A) neutron star B) red giant C) white dwarf D) planet
Q: A point in the universe where the density of matter and the gravitational field are theoretically infinite is called a _______________. A) singularity B) duality C) prominence D) photon
Q: If a person weighs 150 lb on Earth, what will the person weigh on the Moon?
Q: A high tide is occurring at Charleston, South Carolina (80W, 33N). What two longitudes are experiencing low tide?
Q: The particles of interplanetary dust are called ______________.
Q: Solar system space is occupied by very small, solid particles that are called ______________.
Q: Short-period comets, such as Halley's Comet, are believed to come from the ______________.
Q: Long-period comets are believed to come from the ______________.
Q: Sunlight reflected from interplanetary dust results in the appearance of ______________.
Q: As comets approach and move around the Sun, the coma and the tail ______________ in size.
Q: Comets are visible chiefly because of reflected ______________.
Q: Halley's Comet returns about every ______________ years.
Q: Probably the best-known comet is ______________ Comet.
Q: Comets are composed of ______________ and ______________.
Q: The ______________ surrounds the nucleus of a comet.
Q: A meteor ______________ results when a large number of meteoroids enter Earth's atmosphere.
Q: The seriousness of an asteroid collision is gauged by the ______________ scale.
Q: When a meteor strikes Earth's surface, it is called a(n) ______________.
Q: When a meteoroid enters Earth's atmosphere, it is called a(n) ______________.
Q: ______________ is the largest known asteroid.
Q: Asteroids are sometimes referred to as ______________ planets.
Q: Charon is ______________ only moon.
Q: ______________ is the only moon in the solar system to have retrograde motion.
Q: ______________ is the major moon of Neptune.
Q: The major moons of ______________ were named after literary characters.
Q: Saturn's moon named ______________ is the second largest moon in the solar system.
Q: A huge bull's-eye formation is a distinctive feature of Jupiter's moon ______________.
Q: Other than Earth, the only known object in the solar system to have surface water and ice is ______________.
Q: Jupiter's moon named ______________ is volcanically active.
Q: Because Jupiter's four large moons were discovered by Galileo, they are called ______________ moons.
Q: The planet ______________ has the largest moon in the solar system.
Q: ______________ is the largest moon in the solar system.
Q: The names of the Martian moons, Phobos and Deimos, mean ______________ and ______________.
Q: The names of the moons of Mars are ______________ and ______________.
Q: The moons of Mars are ______________; that is, they always keep the same face toward the planet.
Q: The moons of Mars are believed to be captured ______________.
Q: At the time of a solar eclipse, the Moon is in ______________ phase.
Q: The Moon is on an observer's meridian about ______________ minutes later each day.
Q: ______________ tides occur during the first-quarter and last-quarter moon phases.
Q: The highest tides are called ______________ tides.
Q: The portion of a shadow from which only part of the light is excluded by an opaque object is called the ______________.
Q: The central, completely dark portion of a shadow is call the ______________.
Q: A lunar eclipse occurs when the Moon is in the ______________ phase.
Q: Looking at the Moon, the "horns" of a waning crescent moon point toward the ______________.
Q: When the Moon is 90 east of the Sun, it will be in the ______________ phase.
Q: A(n) ______________ moon occurs when more than one-half of the Moon's surface appears illuminated.
Q: A waning crescent moon can appear on an observer's meridian between ______________ and ______________. (Answers in times of day.)
Q: The bright side of the waxing crescent moon is toward the ______________.
Q: When the Moon appears on an observer's meridian at 4 A.M., the Moon is in the ______________ phase.
Q: When the Moon is 90 west of the Sun, the Moon is in the ______________ phase.
Q: When the Moon appears on an observer's meridian at midnight, it is called a(n) ______________ moon.
Q: During the 7-3/8 days between the new and first-quarter phases, the Moon is called a(n) ______________ moon.
Q: The orbital period of the Moon with respect to a star (other than the Sun) is called a(n) ______________ month.
Q: The Moon revolves eastward around Earth every ______________ solar days.
Q: The oldest Moon rocks are about ______________ years old.
Q: The Moon's average distance from Earth is about _______ km.
Q: The largest impact features on the surface of the Moon are the ______________ basins.
Q: The ______________ on the Moon are believed to have been caused by moonquakes.
Q: The Moon's maria, or plains, are believed to have been caused by ______________.
Q: A large volume of the solar system's space is occupied by A) meteors. B) micrometeoroids. C) asteroids. D) comets
Q: Short-period comets, such as Halley's Comet, are believed to come from the A) asteroid belt. B) Oort cloud. C) Kuiper Belt.
Q: Halley's Comet returns approximately every ______________ years. A) 14 B) 76 C) 721 D) 1000
Q: A comet consists of A) a nucleus only. B) a coma only. C) a tail only. D) all of these.
Q: The tail of a comet is shortest when the comet is A) closest to the Sun. B) farthest from the Sun. C) closest to Earth. D) farthest from Earth.
Q: The tail of a comet is longest when the comet is A) closest to the Sun. B) farthest from the Sun. C) closest to Earth. D) farthest from Earth.
Q: Which of the following is usually burned up in Earth's atmosphere? A) Asteroid B) Meteoroid C) Meteor D) Meteorite
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