Quiz
Chapter 5
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Questions in this quiz (23)
1How can the density of the Sun be measured?
- Aby using the density of hydrogen as measured on Earth
- Bby analyzing samples of the solar wind
- Cby using the amount of area covered by Venus during a transit
- Dby using Newton’s laws and the Sun’s diameter
2What is the definition of Absolute Zero?
- Azero degrees Celsius
- Bthe temperature at which no thermal energy can be extracted from atoms
- Cthe temperature at which water freezes
- Dthe temperature at which molecules split into atoms
3The temperature of an object is 273K. What is the temperature in degrees Celsius?
- A273
- B-273
- C0
- D373
4The temperature of an object is 373K. What is the temperature in degrees Celsius?
- A-273
- B-173
- C173
- D273
5What is the temperature of an object from which no heat energy can be extracted?
- A0 Kelvin
- B100 Kelvin
- C100 Celsius
- DCelsius
6The surface temperature of the Sun is about 5800K. Based on this temperature, what is the expected peak wavelength of radiation?
- Aorange
- Bgreen
- Cyellow
- Dred
7Which of the following measures the average speed of the particles (atoms or molecules) in a gas?
- AHeat
- BComposition
- CTemperature
- DBinding energy
8A plot of the continuous spectra of four different stars is shown in the figure. Based on these spectra, which of the stars is the hottest?
- AA
- BB
- CC
- DD
9A plot of the continuous spectra of four different stars is shown in the figure. Based on these spectra, which of the stars has the lowest temperature?
- AA
- BB
- CC
- DD
10The Sun emits its maximum intensity of light at about 520 nm. According to Wien’s Law, at what wavelength would the maximum intensity be for a star with a surface temperature twice that of the Sun?
- A260 nm
- B1040 nm
- C5800 nm
- D11600 nm
11What is the sequence of star colours in order of increasing temperature?
- Ared, yellow, blue
- Bred, blue, yellow
- Cyellow, blue, red
- Dblue, yellow, red
12Is it possible for a red star to emit more energy than a blue star?
- ANo, because the red star has a lower temperature.
- BYes, if the red star has a larger area.
- CYes, if the red star has a larger wavelength of maximum intensity.
- DNo, because red stars are less massive than blue stars.
13The Stefan-Boltzmann law says that hot objects emit energy proportional to the fourth power of their temperature. One star has a temperature of 30,000 K and another star has a temperature of 6,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface? (Please see appendix)
- A5 times
- B25 times
- C625 times
- D10^15 times
14What is the explanation for the pattern of granulation seen on the visible surface of the Sun?
- AThe granules form the base of a circulation pattern that extends from the photosphere to the outer corona.
- BThe granules are regions of nuclear energy generation in the Sun
- CEach granule contains a strong magnetic field, which compresses and heats the gas underneath it.
- DThe granules are the tops of hot gases that have risen from the Sun's convective Zone
15What is found in the centers of granules?
- Ahot material rising to the photosphere from below
- Bcool material falling from the photosphere to the regions below
- Cmaterial that is fainter and hotter than its surroundings
- Dmaterial that is brighter and cooler than its surroundings
16What is responsible for binding the electrons to the nucleus?
- AKirchhoff's law
- BWien’s law
- CCoulomb's Law
- DBalmer series
17Which of the following is a set of rules that describes how atoms and subatomic particles behave?
- AKirchhoff's law
- BWien’s law
- CQuantum Mechanics
- DGeneral Relativity
18What is the lowest energy level in an atom called?
- AGround State
- BThe absolute zero temperature
- CThe ionization level
- DThe energy level from which the Paschen series of hydrogen originates
19The energy of the first level in an atom is 2.2×10-18 J, and the energy of the second energy level is 1.6×10-18 J. What is the energy of the photon that is emitted if an electron moves from the second level to the first?
- A3.5×10^-36 J
- B6.0×10^-19 J
- C3.5×10^-18 J
- D6.0×10^-18 J
20The diagram illustrates a light source, a gas cloud, and three different lines of sight (the observer is located at the numbered positions). Along which line of sight would an observer see an absorption spectrum
- A1
- B2
- C3
21Which of the following can be determined from the spectrum of a star, without additional information?
- Aradial velocity
- Bcore temperature
- Cdistance
- Dvelocity across the sky
22Which of the following is a property of the Sun’s chromosphere?
- Aproduces a coronal filtergram
- Bis below the visible surface of the Sun
- Cis above the corona
- Dhotter than the photosphere
23A boy has mass equal to 35 kg on the surface of the Earth? What is his weight on the surface of the sun?
- A2678 N
- B350 N
- C1589 N
- D9620.8 N
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- Astronomy
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- Ryan Tram
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