astronomy exam practice 1

why does the mily way galazy look like a band of light when we view it in the night sky

our galaxy is relatively flat and we are seeing distant stars along its plane

when thinking of the earth outward which of these gives the correct relative order of distance from earth

kuiper belt, oort cloud, andromeda galaxy, quasar 32 273

according to the potato chip rule which should be the most common

minor planets

according to the potato chip rule which should be least common

clusters of galaxies

what gasses are found in the sun?

helium, carbon, iron, gold, hydrogen

the individual stars you observe at night from santa rosa with your naked eye

are located outside of the solar system

are farther from us than alpha centauri star system is

are mostly larger in diameter than the sun

are located inside the milky way galaxy

on average it takes light about 8 minutes to the earth from venus. what elese can we conclude from this information?

venus is about 8 light minutes away

if venus blows up we would have to wait about 8 light minutes to see the explosion

when we see venus through a telescope we are seeing it the way it looked about 8 minutes away

how many stars are in the solar system?

1

the speed of light is about

186,000 mi./sec, 300,000 km/sec

how far will light travel in one day

1 light day

approximately how many light days are in a light month

30

if the death star were to blow up mars (10 light minutes away) at this instant in time, how long would we have to wait, on earth, to see the explosion

10 minutes

what region of the solar system are most comets found

oort cloud and kuiper belt

what two properties of emr waves are responsible for seeing different colors when looking at a CD or DVD

diffraction and reflection

if you found out that a galaxy was just discovered and astronomers are calling it the orion dwarf galaxy what other conclusion can you correctly make about this galaxy?

that it is smaller galaxy than the milky way galaxy and it is found in the same direction but farther than the stars within the constellation of orion

what is correct about the canis major dwarf galaxy

it is farther from the sun than alpha centauri is from the sun

if you and your friend were separated by distance of 1 astronomical unit what else can you say about this distance

it is equivelent to 93 million miles and it is the average earth to sun distance

the 1st mission to land on the moon was apollo

11 XI

if you traveled to the alpha centauri star system and looked back at the solar system with your unaided eye what would the solar system look like

a relatively bright star

if somebody were to ask how many galaxies are there in the universe the most correct answer would be

billions

if somebody were to ask how many solar systems are there in the universe the most correct answers should be

1

if the solar system were shrunk down to the size of a dime, on this scale, the milky way would be the approximate size of

the united states

has the 2nd longest wavelength

microwaves

has the 3rd highest energy

microwaves and x-rays

is very efficient at vibrating water molecules and is often used in peep jousting

microwaves

has the 3rd lowest frequency

microwaves and radiowaves

passes through skin but gets absorbed by bone

x rays

has a slightly longer wavelength than red visible light

microwaves and radiowaves

has a slightly longer wavelength than red visible light

microwaves and radiowaves

has the 4th lowest energy

visible

(what type of spectrum) would you get from sunlight

dark line absorbtion

(what type of spectrum) Would you get from molten lava (hot, glowing, dense melted rock in Hawaii)

continuous

(what type of spectrum) would a rainbow in the sky after a storm be created by sunlight

dark line absorbtion

what color of visible light has the second lowest frequency

orange

which phenomenon listed is an example of diffraction

being in the bay near mccovey cove in sf and having a wave pass you that entered the bay under the golden gate bridge

wich phenomenon is an example of refraction

a rainbow in the sky after a storm, a spoonto be broken or bent when sticking out of glass of water, seeing a halo around the sun

by observing the wavelength of the missing dark lines in the spectrum of the sun what can you determine about the star

its composition

assume that you use a prism to disperse the light from a certain source and observe a spectrum that has a bright lines of colors with darkness in between from this observation you can correctly conclude that

that the source of light is hot thin gas

which of the following is not a unit of distance

kilohertz

if you are in a room that has only one wavelength of green light illuminating it, and then looked at your DVD’s surface what color would you see coming from the DVD

just green

thinking of experiment we did in class which two balloons are going to pop the quickest, using high powered blue laser focused on them

black balloon and red balloon

why does a blue car look blue when out in the sunlight

the cars paint is reflecting blue light and the cars paint is absorbing the other colors wavelengths that are hitting it aside from the blue color wavelength it is reflecting

what is the name for our supercluster of galaxies

local superstar and laniakea

a sundog in the sky is an example of what property of emr?

refraction