Astronomy Test #2 Review

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ASTR-1030 Final

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Naomi Pham

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Astronomy Test #2 Review


Astronomy Test #2 ReviewOnline version ASTR-1030 Final by Naomi Pham 1 According to Kepler's second law, where does an object move SLOWEST in its orbit as seen in the image? a A b B c m d f1 2 Position B in the diagram is called a the ecliptic b the aphelion point c the perihelion point d the orbit period 3 If the Earth moved to an average distance of 4 A.U. from the Sun, what would be the length of the year? a 2 years b 4 years c 8 years d 16 years 4 According to Kepler's 1st Law, what is the shape of the planetary orbit? a a circle b a rectangle c an ellipse d a triangle 5 A measure of the size of the elliptical orbit of a planet is best described by the a semi-major axis b perihelion point c roundness d period of the orbit e tilt of the orbit 6 Vega has a higher surface temperature than the Sun; therefore, a Vega emits more blue light and more red light than the Sun. b Vega emits less blue light and more red light than the Sun. c Vega emits blue light and less red light than the Sun. d Vega emits less blue light and less red light than the Sun. 7 Use Kepler's 3rd Law of motion and calculate the approximate orbit period of an asteroid if the semi-major axis a = 2 A.U. a 2 years b 3 years c 10 years d 1.25 years 8 Which planet has the shortest year (orbit period)? a Mercury b Venus c Earth d Mars 9 Which one of the following statements is true about the electromagnetic (EM) spectrum? a Visible light takes up only a very small part of the total range of wavelengths in the EM spectrum b Visible light takes up most (but not all) of the total range of wavelengths in the EM spectrum c Visible light takes up all of the EM spectrum d Visible light is not part of the EM spectrum 10 Electromagnetic waves from a radio station travel (____) the speed of light? a slower than b the same as c faster than 11 Compared to the wavelength of visible light, the wavelength of an x-ray wave is a much smaller b much larger c about the same 12 What is the ROUND-TRIP light travel time from Earth to Jupiter (at the Earth-Jupiter distance of about 4.0 A.U.) [Approximate light travel time from the Sun to Earth = 8 minutes] a 4 hours b 64 minutes c 8 minutes d 24 minutes 13 Star A is 10000 K ; Star B is 5000K; Star C is 2500 K. Which star would appear reddish in color? a Star A b Star B c Star C 14 Which star in the image has the highest temperature? a red b blue c yellow d orange 15 First observed sunspots with a telescope. a Aristole b Issac Newton c Johannes Kepler d Galileo Galilei e Tycho Brahe 16 He found that planet orbits were ellipses, not circles. a Aristole b Issac Newton c Johannes Kepler d Galileo Galilei e Tycho Brahe 17 Explained planetary motion by the concept of a force. a Aristotle b Issac Newton c Johannes Kepler d Galileo Galilei e Tycho Brahe 18 A philosopher who made on of the first models of the solar system, a geocentric model. a Aristotle b Issac Newton c Johannes Kepler d Galileo Galilei e Tycho Brahe 19 What spectrum would be seen from sunlight reflected off the cold atmosphere of Saturn's moon Titan? a Emission spectrum b Absorption spectrum c Continuous spectrum 20 Star X = 200 nm ; Star Y = 400 nm. Which star is colder (lower temperature)? a Star X b Star Y 21 Kepler's third law states that P^2 = a^3. What does this law mean? a the Sun is at the center of planetary orbits b all planetary orbits are ellipses c slowly moving planets are close to the Sun d a planet moves more rapidly when near the Sun than when farther away e planets close to the Sun have shorter orbital periods than those farther away 22 What "color" is a neon sign? a Violet b Blue-Green c Yellow d Orange-Red 23 Imagine an emission spectrum produced by a container of hydrogen gas. Adding more hydrogen gas into the container will change the colors of the lines occurring in the spectrum. a True b False 24 The heliocentric model of the universe holds that Sun is at the center of the solar system. a True b False 25 Which spectrum would show emission lines? a Spectrum 1 b Spectrum 2 c Spectrum 3 26 What kind os spectrum is produced in Figure 1? a continuous b emission c absorption 27 As you drive towards a loud siren, the sound you receive from the siren is shifted to longer wavelengths. a True b False 28 What key piece of information do astronomers learn about stars by analyzing the spectrum of starlight? a distance b size c composition d all of these 29 If Earth were moved to a distance of 3 AU from the Sun, how much stronger or weaker would the gravitational force on this planet would be a 3 times weaker b 3 times stronger c 9 times weaker d 9 times stronger 30 Suppose that a planet of 10 times the mass of Earth was orbiting the Sun at the same distance as Earth (1 AU). If the Sun has the same mass, the gravitational force on this planet would be a 1/10 of that on Earth b 10 times that on Earth c 100 times that on Earth d 1/100 of that on Earth 31 Which of the following has the longest wavelength in the electromagnetic spectrum? a blue light b infrared waves c gamma rays d radio waves 32 If you ADDED all the colors of light from a rainbow, what "color is seen? a Blue b Red c Yellow d White e Black 33 The energy of a photon of X-rays, compared to the energy of a photon of visible light, is a much lower b much higher c about the same 34 If the Earth had no atmosphere, what happens to a hammer and a feather when you drop them at the same time from a height of 1 meter? a The hammer hits the ground first b The feather hits the ground first c They both hit the ground at the same time 35 Galileo's discovery of the sunspots on the Sun was shocking because it showed that a not every celestial object orbits the Earth b the Sun is the center of the solar system c celestial objects were not "perfect" d gravity only works at the Sun 36 Which astronomer's solar system model is represented in this figure? a Galileo b Aristotle c Kepler d Copernicus 37 Pieces of metal are heated by varying amounts in a flame. The coolest of these is the one that shows which color most prominently? a red b blue c yellow d white 38 If you increase the temperature of a blackbody by 2 times, the energy emitted (flux or brightness) by that object would increase or decrease by how many times? a increase by 4 times b decrease by 2 times c increase by 81 times d decrease by 64 times e increase by 16 times 39 Which blackbody curve in the figure would best represent a yellow-white-colored star? a 7500 K star b 6000 K star c 4500 K star 40 According to Wein's Law and Stefan-Boltzmann's Law, how does the color and intensity change as the temperature of a hot object increases? a it gets bluer and dimmer b it gets redder and brighter c it gets redder and dimmer d it gets bluer and brighter

Astronomy Test #2 Review

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Astronomy Test #2 ReviewOnline version

by Naomi Pham

According to Kepler's second law, where does an object move SLOWEST in its orbit as seen in the image?

Position B in the diagram is called

If the Earth moved to an average distance of 4 A.U. from the Sun, what would be the length of the year?

According to Kepler's 1st Law, what is the shape of the planetary orbit?

A measure of the size of the elliptical orbit of a planet is best described by the

Vega has a higher surface temperature than the Sun; therefore,

Use Kepler's 3rd Law of motion and calculate the approximate orbit period of an asteroid if the semi-major axis a = 2 A.U.

Which planet has the shortest year (orbit period)?

Which one of the following statements is true about the electromagnetic (EM) spectrum?

Electromagnetic waves from a radio station travel (____) the speed of light?

Compared to the wavelength of visible light, the wavelength of an x-ray wave is

What is the ROUND-TRIP light travel time from Earth to Jupiter (at the Earth-Jupiter distance of about 4.0 A.U.) [Approximate light travel time from the Sun to Earth = 8 minutes]

Star A is 10000 K ; Star B is 5000K; Star C is 2500 K. Which star would appear reddish in color?

Which star in the image has the highest temperature?

First observed sunspots with a telescope.

He found that planet orbits were ellipses, not circles.

Explained planetary motion by the concept of a force.

A philosopher who made on of the first models of the solar system, a geocentric model.

What spectrum would be seen from sunlight reflected off the cold atmosphere of Saturn's moon Titan?

Star X = 200 nm ; Star Y = 400 nm. Which star is colder (lower temperature)?

Kepler's third law states that P^2 = a^3. What does this law mean?

What "color" is a neon sign?

Imagine an emission spectrum produced by a container of hydrogen gas. Adding more hydrogen gas into the container will change the colors of the lines occurring in the spectrum.

The heliocentric model of the universe holds that Sun is at the center of the solar system.

Which spectrum would show emission lines?

What kind os spectrum is produced in Figure 1?

As you drive towards a loud siren, the sound you receive from the siren is shifted to longer wavelengths.

What key piece of information do astronomers learn about stars by analyzing the spectrum of starlight?

If Earth were moved to a distance of 3 AU from the Sun, how much stronger or weaker would the gravitational force on this planet would be

Suppose that a planet of 10 times the mass of Earth was orbiting the Sun at the same distance as Earth (1 AU). If the Sun has the same mass, the gravitational force on this planet would be

Which of the following has the longest wavelength in the electromagnetic spectrum?

If you ADDED all the colors of light from a rainbow, what "color is seen?

The energy of a photon of X-rays, compared to the energy of a photon of visible light, is

If the Earth had no atmosphere, what happens to a hammer and a feather when you drop them at the same time from a height of 1 meter?

Galileo's discovery of the sunspots on the Sun was shocking because it showed that

Which astronomer's solar system model is represented in this figure?

Pieces of metal are heated by varying amounts in a flame. The coolest of these is the one that shows which color most prominently?

If you increase the temperature of a blackbody by 2 times, the energy emitted (flux or brightness) by that object would increase or decrease by how many times?

Which blackbody curve in the figure would best represent a yellow-white-colored star?

According to Wein's Law and Stefan-Boltzmann's Law, how does the color and intensity change as the temperature of a hot object increases?