click below
click below
Normal Size Small Size show me how
Physical Science
Exam Review
Question | Answer |
---|---|
The charge on an electron, which is one of the prime constituents of an atom, is | Correct Answer: negative. |
About how many extra electrons would be present on a charged object having an accumulated charge of one (1) couloommmb? | Correct Answer: 6.3 x 10^18 |
When electrical power losses in a circuit are calculated, we can use the relationship I^2R,which is also often referred to as the | Correct Answer: joule heat. |
The kilowatt-hour is a unit used for which of the following? | Correct Answer: electrical work |
Electrical elements that are connected in a circuit so that the same current must pass through each one in turn are said to be connected in | Correct Answer: series. |
A circuit breaker or a fuse is placed in an electrical circuit to | Correct Answer: protect a circuit from carrying too much current. |
The north pole of a stationary magnet will be attracted to | Correct Answer: a magnetic south pole. |
Magnetic field lines | Correct Answer: always make complete loops through and around magnets. |
Moving electric charges create | Correct Answer: electrical resonances. |
Which of the following would not be considered an asset in providing electrical safety for power tool uses? | Correct Answer: a nongrounded metal case on the tool. |
The ecliptic is | Correct Answer: the apparent path followed by the Sun on the celestial sphere. |
Which of the following is a terrestrial planet? | Correct Answer: Mercury |
What is the name of the largest moon of Neptune? | Correct Answer: Triton |
Which of the following planets has the highest surface temperature? | Correct Answer: Mercury |
One of the planets that revolves around the Sun seems to have characteristics that more closely resemble an asteroid than the other planets. Which planet is this? | Correct Answer: Pluto |
The time interval between two successive conjunctions (either inferior or superior) of a planet with the Sun as observed from Earth is known as the planet's | Correct Answer: synodic period. |
An ancient theory that Earth was the center of the solar system (or universe)is referred to as the | Correct Answer: geocentric theory. |
Where is most of the mass of our solar system concentrated? | Correct Answer: in the Sun |
About how long does the condensation theory suggest that it took for our solar system to form? | Correct Answer: about 100 million y |
What does statistical analysis suggest about the existance of other planetary systems in the universe? | Correct Answer: It shows that there is a good probability that many exist. |
One cycle of the precession of Earth's axis of rotation with respect to the fixed stars takes about | Correct Answer: 26,000 years. |
The prime meridian for determining longitude on Earth's surface has been chosen to run through | Correct Answer: Greenwich, England. |
The point directly above the head of any observer on Earth's surface is called his or her | Correct Answer: zenith. |
The month is based on | Correct Answer: the periodic phases of the Moon. |
The arrangement of streets in a town that run North-South and East-West sets up what type of system? | Correct Answer: a Cartesin coordinate system |
The angular distance north or south of Earth's equator is a measure of | Correct Answer: latitude |
A new standard time zone begins as you travel around Earth's equator every | Correct Answer: 15 degrees |
A line on the surface of Earth where the longitude is always the same is referred to as | Correct Answer: a meridian. |
The noontime Sun will be directly over the equator of Earth on which day or days of the year? | Correct Answer: the fall and spring equinoxes |
During what season or seasons of the year will the Sun have a declination of 23.5 degrees North? | Correct Answer: Summer |
The diameter of Earth's Moon is | Correct Answer: a little over one-fourth the diameter of Earth. |
Large and small bowl-shaped depressions in the surface of the Moon that are believed to have been caused by impacts of objects from space are called | Correct Answer: craters. |
The youngest rocks that have been found on the lunar surface suggest that volcanoes on the Moon | Correct Answer: have been inactive for over 3.1 billion years. |
What is the relationship between the Moon's plane of revolution around Earth and the ecliptic plane on which Earth revolves around the Sun? | Correct Answer: The Moon's plane of rotation is tilted by +/- 5 degrees with respect to the ecliptic. |
The closest point of approach between the Moon and Earth is called | Correct Answer: perigee. |
The phase of the Moon that occurs between its first-quarter and full phases is known as | Correct Answer: the waxing gibbous phase. |
The last-quarter moon will appear on any observer's overhead meridian at | Correct Answer: 6 A.M. local solar time. |
During what season of the year will the full moon be highest in the sky for an observer in the northern United States? | Correct Answer: winter |
Where must the Moon be with respect to Earth when a solar eclipse is taking place? | Correct Answer: between Earth and the Sun. |
The Moon's gravitational attraction affects Earth's oceans by causing | Correct Answer: two high and two low tides daily. |
The Sun rotates on its own internal axis with a period of about | Correct Answer: 25 days |
The thin, red, outer layer of the Sun's surface that can be seen only for a few seconds during a solar eclipse is called the | Correct Answer: chromosphere. |
The measurement of angular distance north or south of the celestial equator on a celestial sphere is referred fo as | Correct Answer: declinaiton. |
Which of the following units of distance is the largest? | Correct Answer: the parsec. |
The brightness of a star as seen from Earth is referred to as the star's | Correct Answer: apparent magnitude. |
A very large star whose surface temperature is several thousand degrees cooler than that of the Sun's photosphere is referred to as | Correct Answer: a red giant. |
A rapidly rotating neutron star that has been detected on Earth by observing its regular bursts of radio emission is known as | Correct Answer: a pulsar. |
The mass of a black hole is believed to be concentrated in a very small central region referred to as | Correct Answer: a singularity. |
Hubble's law expresses a relationship between the distance from Earth to a galaxy and that galaxy's | Correct Answer: radial velocity. |
We believe that quasars are very distant objects because astronomers have been able to measure their | Correct Answer: large red shifts |