Test
Astronomy 104
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Preguntas del test (36)
1The word astronomy means:
- A"Patterns among the stars."
- B"To study the stars."
- C"Discovering the universe."
- D"Personally traits set by the stars."
2The number of classical planets in our Solar System is:
- AEight
- BNine
- CTwevle
- DSix
- EFour
3A light-year is a unit commonly used in astronomy as a measure of:
- ATime
- BSpeed
- CMass
- DDistance
- EA term to confuse students
4The early universe was composed mainly of which two elements?
- AHydrogen and helium
- BCarbon and oxygen
- CHydrogen and oxygen
- DCarbon and iron
- ENitrogen and oxygen
5There are ________ constellations in the entire sky.
- A12
- B13
- C88
- DHundreds of
- EThousands of
6The meridian is defined as an imaginary circe on the sky on which lie the :
- ACelestial equator and vernal equinox.
- BNorth and south celestial poles.
- CZenith and the north and south celestial poles.
- DZenith and east and west directions.
- ECelestial equator and summer solstice.
7What defines the location of the equator on Earth?
- AThe axis around which Earth rotates.
- BWhere the ground is the warmest.
- CThe tilt of Earth's rotational axis relative to its orbit around the Sun.
- DThe orbit of Earth around the Sun.
- EAll of the above.
8The direction directly overhead of an observer defines his or her:
- AMeridian
- BCelestial pole
- CNadir
- DCircumpolar plane
- EZenith
9The apparent path of the Sun across the celestial sphere over the course of a year is called the:
- APrime meridian
- BEcliptic
- CCircumpolar plane
- DCelestial equator
- EEclipse
10Which laws are based entirely on observational data without having any theoretical framework behind them?
- APhysical laws
- BGalileo's laws of planetary motion
- CNewton's law of motion
- DDeductive laws
- EEmpirical laws
11The time it takes a planet to complete one full orbital revolution is commonly known as its:
- APeriod
- BFrequency
- COrbital domain
- DVelocity
- EEccentricity
12If the Sun is located at one focus of Earth's elliptical orbit, what is at the other focus?
- AEarth
- BThe moon
- CAnother planet
- DNothing
- EJupiter
13Kepler's third law is a relationship between an orbiting object's:
- AGravitational force and mass
- BAcceleration and mass
- CVelocity and period
- DPeriod and semimajor axis
- ESemimajor axis and velocity
14Newton's first law states that objects in motion:
- AEventually come to rest.
- BExperience an unbalanced force.
- CExperience a nonzero acceleration.
- DStay in motion.
- EMust wait for the second law to be enacted.
15Which if the following properties of an astronaut changes when he or she is standing on the moon, relative to when the astronaut is standing on Earth?
- AWeight
- BMass
- CInertia
- DAll of the above
- ENothing changes
16Suppose you are suddenly transported to a planet with 1/4 the mass of Earth but the same radius as the Earth. Your weight would ________ by a factor of ________.
- AIncrease; 4
- BIncrease; 16
- CDecrease; 4
- DDecrease; 16
- EIncrease; 2
17The force of gravity that an object is directly proportional to its:
- AInertia
- BSize
- CMass
- DDensity
- EDistance
18If you measured the orbital period of the Moon and the distance between the Earth and the Moon then you could calculate:
- AThe mass of the Moon
- BThe sum of the masses of the Earth and the Moon
- CThe average distance between the Earth and Sun
- DThe radius of the Earth
- EThe radius of the Moon
19The speed of light was first determined by which scientist?
- AGalileo
- BBugs Bunny
- CRomer
- DEinstein
20If the Sun instantaneously stopped giving off light, what would happen on Earth?
- AIt would immediately get dark.
- BIt would get dark 8 minutes later.
- CIt would het dark 27 minutes later.
- DIt would get dark 1 hour later.
- EIT would get dark 24 hours later.
21A light-year is a unit that is used to measure:
- ATime
- BWavelength
- CSpeed
- DEnergy
- EDistance
22If the frequency of a beam of light were to increase, its period would ________ and its wavelength would ________?
- ADecrease, increase.
- BIncrease; decrease.
- CIncrease; increase.
- DDecrease; decrease.
- EStay the same; stay the same
23Which of the following lists different types of electromagnetic radiation in order from the smallest wavelength to the largest wavelength?
- ARadio waves, infrared, visible, ultraviolet, X-rays.
- BGamma rays, ultraviolet, visible, infrared, radio waves.
- CGamma rays, X-rays, infrared, visible, ultraviolet.
- DX-rays, infrared, visible, ultraviolet, radio waves.
- ERadio waves, ultraviolet, visible, infrared, gamma rays
24As wavelength increases, the energy of a photon ________ and its frequency ________.
- AIncreases; decreases.
- BIncreases; increases.
- CDecreases; decreases.
- DDecreases; increases
25How do the wavelength and frequency of red light compare to the wavelength and frequency of blue light?
- ARed light has a longer wavelength and higher frequency than blue light.
- BRed light has a longer wavelength and lower frequency than blue light.
- CRed light has a shorter wavelength and higher frequency than blue light.
- DRed light has a shorter wavelength and lower frequency than blue light
26Why is an iron atom a different element than a carbon atom?
- AA carbon atom has fewer neutrons in its nucleus than an iron atom.
- BAn iron atom has more protons in its nucleus than a carbon atom.
- CAn iron atom has more electrons than a carbon atom.
- DA carbon atom is bigger than an iron atom.
- EAll of the above are true.
27When an electron moves from a higher energy level in an tom to a lower energy level:
- AThe atom is ionized.
- BA continuous spectrum is emitted.
- CA photon is absorbed.
- DThe electron needs to lie down to take a rest.
- EA photon is emitted.
28Which of these objects would emit an absorption spectrum?
- AAn incandescent light bulb.
- BA fluorescent light bulb.
- CAn isolated hot gas cloud.
- DA hot, solid object.
- EA thin, cool gas cloud that lies in front of a hotter blackbody.
29A spaceship is traveling toward Earth while giving off a constant radio signal with a wavelength of 1 meter. What will the signal look like to people on Earth?
- AA signal with a wavelength less than 1m.
- BA signal with a wavelength more than 1m.
- CA signal moving faster than the speed of light.
- DA signal moving slower than the speed of light.
- EA signal with a wavelength of 1m, moving the normal the normal speed of light.
30Which of these would have the biggest redshift?
- AA star moving slowly toward you.
- BA star moving fast toward you.
- CA star moving slowly away from you.
- DA star moving fast away from you.
- EA star that is not moving away from you or toward you.
31What does it mean to say that an object is in thermal equilibrium?
- AIt isn't absorbing any energy.
- BIt isn't radiating any energy.
- CIt is radiating more energy than it is absorbing.
- DIt is absorbing more energy than it is radiating.
- EIt is absorbing the same amount of energy that it is radiating.
32The Kelvin temperature scale is used in astronomy because:
- AAt 0 K an object has absolutely zero energy.
- BWater freezes at 0 K.
- CWater boils at 100 K.
- DHydrogen freezes at 0 K.
- EThe highest temperature possible is 1000 K.
33Why do some stars in the sky appear blue, while other stars appear red?
- AThe red stars are hotter on their surfaces than the blue stars.
- BThe blue stars are hotter on their surfaces than the red stars.
- CThe blue stars are closer to us than the red stars.
- DThe red stars are closer to us than the blue stars.
- EThe blue stars are moving away from us faster than the red stars.
34A reflecting telescope is preferable over a refracting telescope because:
- AIts lack of chromatic aberration.
- BIts shorter length for the same aperture size.
- CThere is no aperture limit.
- DIts lighter weight for larger apertures.
- EAll of the above are valid reasons.
35Which telescope would collect 100 times more light than a 1-meter telescope?
- A100-meter telescope.
- B80-meter telescope.
- C50-meter telescope.
- D30-meter telescope.
- E10-meter telescope.
36Chromatic aberration results from:
- ABlue light being reflected more than red light.
- BRed light being reflecting more than blue light.
- CRed light being refracted more than blue light.
- DBlue light being refracted more than red light.
- EA lens being polished incorrectly.
Información
- Descripción
- Chapters 1-6
- Autor
- Natalie Balzert
- Idioma
- English
- Visitas
- 871
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- Valoración
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