astro quiz 2

1.

1 point

Which of the following is constant for all types of electromagnetic waves in space?

speed

energy

frequency

color

2.

1 point

Light waves differ fundamentally from either water waves or sound waves because

they do not require a material medium

they have various wavelengths

they do not travel from place to place instantaneously

the amplitude of light never changes

3.

1 point

If an object is moving TOWARDS you, what effect do you observe in the spectrum of that object?

it appears red shifted

the light appears to be moving faster

all the spectral lines appear broadened

it appears blue shifted

4.

1 point

If an objet is moving AWAY from you what effect do you observe in the spectrum of that object?

it appears red shifted

the light appears to be moving faster

all the spectral lines appear broadened

it all appears blue shifted

5.

1 point

which of the following types of visible light has the highest energy?

red

yellow

green

violet

6.

1 point

which of the following types of visible light has the lowest engergy?

red

yellow

green

violet

7.

1 point

a scientist reports that his measurement of the temp of the surface of a newly discovered planet is -20 K. what conclusion can you draw from this report?

the scientist measured only the dark side of the planet away form the sun

the planet is a very long way from the sun

the planet has no atmosphere

the result is erroneous since on cannot have negative absolute temp

8.

1 point

the energy E of a photon is related to the wavelength of the radiation by what relation?

E= hc/Y

E=hY

E= hcY

E= h/cY

9.

1 point

which of the following can be determined by using the Doppler effect?
I the radial velocity of a star
II the speed at which a star is moving away from an observer
III the transverse velocity of a star

I & II

II & III

I & III

I, II & III

10.

1 point

compared to visible waves radio waves have

higher energy and shorter wavelength

lower energy and longer wavelength

lower energy and shorter wavelength

higher energy and longer wavelength

11.

1 point

compared to visible waves, X ray waves have

higher energy and shorter wavelength

lower energy and shorter wavelength

lower energy and longer wavelength

higher energy and longer wavelength

12.

1 point

which of the following statements is not true about hot dense glowing bodies?

they emit thermal radiation

they emit radiation at all wavelengths

the hotter they are the redder they are

13.

1 point

for a glowing body having the colors listed below which would be the hottest?

red

blue

yellow

green

black

14.

1 point

why do we see different phases of the moon?

the motion of the moon in its orbit around the earth causes us to see different amounts of the earths shadow falling on the moon

the distance of the moon from the earth changes because of the elliptical orbit of the moon causing the sunlit side of the moon to move relative to the earth

the motion of the moon in its orbit around the earth causes us to see different amounts of the sunlit side of the moon

the rotation of the moon around its own axis cases us to see different amounts of the sunlit side of the moon

15.

1 point

the earths shadow falling on the moon is the reason we see

solar eclipses

the earths shadow cannot fall on the moon

lunar eclipse

the phases of the moon

16.

1 point

the moon shadow falling on the earth is the reason we see

the phases of the moon

the earths shadow cannot fall on the moon

solar eclipses

lunar eclipes

17.

1 point

how much of the total surface of the moo is illuminated by the sun when it is in the crescent phase

one quarter

very little

all of it

one half

18.

1 point

how does the moon rotate to keep one face pointed toward the earth at all times

it completes one full rotation per day

it completes one full rotation per month

it completes one full rotation per year

it does not rotate at all

19.

1 point

which of the following statements about the moons position and motion is not correct?

the moon does not rotate at all since it keeps one face toward the earth at all times

the moons rotation period is equal to its orbital period

the time from full moon to full moon is longer than the moons orbital period

the time from full moon to full moon is longer that the moons rotation period on its axis

20.

1 point

during a lunar eclipse the

sun comes between earth and the moon

moon comes between earth and the sun

earth comes between the sun and the moon

sun goes below the horizon

21.

1 point

during a solar eclipse the

sun goes below the horizon

sun comes between earth and the moon

earth comes between the sun and the moon

moon comes between earth and the sun

22.

1 point

which of the following statements is correct for eclipses in the sun earth moon system?

an eclipse of the sun occurs only at full moon

an eclipse of the sun occurs only at new moon

23.

1 point

which of the following statements is correct for eclipses in the sun earth moon system?

an eclipse of the moon occurs only at new moon

an eclipse of the moon occurs only at full moon

24.

1 point

the reason why we see an annular eclipse of the sun is

the moons orbit around the earth is not perfectly circular

the moon is not directly in between the sun and earth

the moon is much closer to the earth than the sun is

25.

1 point

is it possible to see annular lunar eclipse?

yes, it is possible because the moon is so close to the earth that it appears large

no, it is not possible becasue the moon does not emit light and only reflects light

yes it is possible because the moon and the earth are moving

no, it is not possible because the earth is much larger than the moon.

26.

1 point

which of the following conditions holds for relative distances during a solar eclipse?

the moon is closer to the sun than is the earth

the earth is closer to the sun than is the moon

the moon and the earth have to be at the same distance from the sun

since the condition for a solar eclipse is independent of relative distances of the earth and moon from teh sun either the moon or the earth can be closest to the sun

27.

1 point

which of the following conditions holds for relative distances during a lunar eclipse?

the earth is closer to the sun than is the moon

the moon is closer to the sun than the earth

the moon and the earth have to be at the same distance from the sun

since the condition for a lunar eclipse is...

28.

1 point

which of the following is a necessary condition for lunar or solar eclipses?

the earth must be on the celestial equator

the sun must be on the celestial equator

the sun must be close to or crossing the ecliptic plane

the moon must be close to or crossing the ecliptic plane.

29.

1 point

when in total lunar eclipse the moon shows a reddish color because

light from the northern and southern lights on earth, which is predominantly red, illuminates the moon

this is the color of the residual thermal glow from a still warm moon after the abrupt removal of the heat of the sun

the moon is illuminated only by the residual glow from the dark side of the earth which is predominantly red

only the red part of the solar spectrum is deflected onto it by the earths atmosphere

30.

1 point

the moon rotates synchronously as it orbits earth always keeping one side pointed toward earth becasue

it had precisely this rate of spin, equal to its revolution period around earth when it was formed

of the effect of the magnetic field of earth on the magnetic field of the moon, much like the effect on a compass needle

off frictional effects from micro meteoroids in its orbital plane, espicially early in its history

of the effect of the gravitational pull of earth which causes tidal friction on the moon

31.

1 point

the length of a day on the earth

was longer in the past because the earth used to spin faster

was shorter in the past because the earth used to spin faster

was longer in the past because the earth used to spin more slowly

was shorter in the past because the earth used to spin more slowly

was the same in the past because the earths rotational speed is constant

32.

1 point

how are wavelength frequency and energy related for photons of light?

longer wavelength means lower frequency and lower engergy

longer wavelength means higher frequency and lower engergy

longer wavelength means higher frequency and higher engergy

longer wavelength means lower frequency and higher engergy

there is no simple relationship because different photons travel at different speeds

33.

1 point

we can see each other in the classroom right now because we

emit thermal radiatin

emit visible light

emit infrared light

reflect visible light

reflect infrared light

34.

1 point

when an electron in an atom goes from a higher energy state to a lower energy state the atom

emits a photon of a specific frequency

absorbs a photon of a specific frequency

absorbs several photons of a specific frequency

can emit a photon of any frequency

can absorb a photon of any frequency

35.

1 point

which planet has the highest average surface temperature and why?

mercury because it is closest to the sun

mercury because of its dense carbon dioxide atmosphere

Venus because of its dense carbon dioxide atmosphere

mars because of its red color

Jupiter because it is so big

36.

1 point

which of the observations indicates that conditions on mars may have been suitable for life in the past?

there are very large extinct volcanoes on mars

there is a very deep and long canyon that extends across mars

there are dried up riverbeds on mars

mars has polar caps made of dry ice

mars has two small moons

37.

1 point

according to our theory of solar system formation why do we find some expectations to the general rules and patterns of the planets?

our theory is not quite correct because it cannot explain these exceptions

most of the exceptions are the result of giant impacts or close gravitational encounters

the exceptions probably represents objects that formed recently rather than early in the history of the solar system

the exceptions probably represent objects that were captured by our solar system from interstellar space

38.

1 point

the nebular theory of the formation of the solar system successfully predicts all but one the following. which one does the theory not predict?

planets orbit around the sun in nearly circular orbits in a flattened disk

the compositional differences between the terrestrial and jovian planets

the equal number of terrestrial and jovian planets

the presence of asteroids and comets

the craters on the moon

39.

1 point

the core mantle and crust of a planet are defined by differences in their

geological activity

temperature

strength

density

40.

1 point

what are the conditions necessary for a terrestrial planet to have a strong magnetic field?

a molten metallic core only

fast rotation only

a rocky mantle only

both a molten metallic core and reasonably fast rotation

both a metal core and a rocky mantle