Test 2

¡Supera tus tareas y exámenes ahora con Quizwiz!

What is the peak wavelength of light coming from a star with a temperature of 2500 K?

1,159

What is the temperature of a star (in Kelvin) if its peak wavelength is 150 nm (that is, 150 x 10^-9 m)?

19330

What is the temperature of a star (in Kelvin) if its peak wavelength is 1,200 nm (that is, 1200 x 10^-9 m)?

2,416.67

The appearance of Earth's moon is nearly identical to

Mercury

Two stars in the sky give off the same amount of total energy, but Star A appears 121 times fainter in our night sky than Star B. How many times farther away is Star A than Star B?

11

Where did Earth's oceans come from?

Rain from water vapor in the early atmosphere

The UBVR filters used in astronomy correspond to what colors of light?

ultraviolet, blue, green, and red

The surface of the moon contains geologic evidence for ___________ on the moon in the past.

volcanoes

The physical distance from one wave peak to the next is called the

wavelength

The physical distance from one wave peak to the next is called the ...

wavelength

Which of the following provides observational evidence that Mars has weather and an atmosphere?

all the above

The best time to observe the moon to see its crater is during a

crescent moon

Light pollution has been linked to which of the following? (Select all that apply)

breast cancer rates in women;Survival of specific bat species; Negative changes to bird migration; Sea turtle hatchling survival rates

If the peak wavelength of a star at rest is 350 nm, but astronomers on earth observer that is has been shifted by 2.25 nm. Then how fast is the star moving relative to the earth?

1,928.571

Star A is 10,000 times brighter than Star B. How many times hotter is Star A than Star B?

10

Two stars in the sky give off the same amount of total energy, but Star A appears 100 times fainter in our night sky than Star B. How many times farther away is Star A than Star B?

10

Star A is 3.2 times hotter than Star B. How many times brighter is Star A than Star B?

104.86

According to the Stefan-Boltzmann Law, a larger star will appear _________ than a smaller star of the same temperature.

brighter

If the Sun were suddenly moved 4 times closer to Earth, how many times brighter would it be?

16

If the Sun was moved farther away and suddenly appeared 4 times fainter in the sky, how many times further away would it be?

2

The gas in the solar nebula began at a temperature of about ....

2000k

What is the temperature of a star (in Kelvin) if its peak wavelength is 1,200 nm (that is, 1200 x 10^-9 m)?

2416.67

If the Sun were suddenly moved 5 times further away. How many times fainter would it be?

25

How many asteroids (that we know of) are on a potential collision course with Earth?

25-50

What is the peak wavelength of light coming from a star with a temperature of 10,250 K?

282

Star A is 200 times brighter than star B. How many times hotter is Star A than Star B?

3.76

Star A is 2.5 times hotter than Star B. How many times brighter is Star A than Star B?

39.06

If the distance to a star was suddenly cut in half, how many times brighter would the star appear?

4

If the peak wavelength of a star at rest is 660 nm, but astronomers on earth observer that is has been shifted by 0.001 nm. Then how fast is the star moving relative to the earth?

454

What is the peak wavelength of light coming from a star with a temperature of 5300 K?

547.1

If the peak wavelength of a star at rest is 550 nm, then what peak wavelength is observed when the star is traveling 150,000 m/s away from the Earth.

550.275

Two stars in the sky give off the same amount of total energy, but Star A appears 36 times fainter in our night sky than Star B. How many times farther away is Star A than Star B?

6

What is the temperature of a star (in Kelvin) if its peak wavelength is 425 nm?

6,818.29

What is the typical dynamic range of an astronomical image?

60,000:1

If the peak wavelength of a star at rest is 615 nm, then what peak wavelength is observed when the star is traveling 2,500,000 m/s toward the Earth.

609.875

What is the peak wavelength of light coming from a star with a temperature of 4,300 K?

673.95

If the peak wavelength of a star at rest is 725 nm, then what peak wavelength is observed when the star is traveling 800,000 m/s toward the Earth.

723.07

Two stars in the sky give off the same amount of total energy, but Star A appears 64 times fainter in our night sky than Star B. How many times farther away is Star A than Star B?

8

Regular jpeg images have only 256 "levels" available in each pixel, so they are considered ...

8-bit images

Star A is 3 times hotter than Star B. How many times brighter is Star A than Star B?

81

If the Sun were suddenly moved 3 times further away, how many times fainter would it be?

9

Two stars appear the same brightness in the sky, but Star A is three times farther away than Star B. How many times more energy is Star A giving off than Star B?

9

Why don't we see the light being emitted by our own bodies?

because our bodies are too cold for us to see the radiation

If we could capture the spectrum of an exoplanet, we may find evidence for life on that planet in the form of

biosignatures

Mercury gets incredibly hot and incredibly cold because

it does not have an atmosphere

On Mercury and the Moon, we notice that larger craters __________ smaller craters.

came before

Light is so fast that it could go all the way around the earth 7 times in

one second

The discovery of _________ prompted astronomers to reconsider whether Pluto should really be called a planet.

Eris

The largest mountain in the solar system is

Olympus Mons

Jupiter weighs roughly

twice as much as all the other planets combined

Which of the following regions of the electromagnetic spectrum has the shortest wavelength?

ultraviolet

Our atmosphere acts like a filter, which blocks

ultraviolet and infrared light

What molecules dominated the Earth's primordial atmosphere?

carbon dioxide and water vapor

The Jovian planets are composed mostly of _______ and _________.

hydrogen-helium

How can you increase the resolution of a telescope?

increase the aperture/size of the telescope

Star A is 4 times brighter than Star B. How many times hotter is Star A than Star B?

1.41

What is the temperature of a star (in Kelvin) if its peak wavelength is 550 nm (that is, 550 x 10^-9 m)?

5,269.09

When we look into the night sky, we are literally looking

into the past

How many millimeters will a 17 mm wavelength radiowave be shifted if the source is traveling away from the observer at 12,000,000 m/s?

0.68

If the peak wavelength of a star at rest is 1375 nm, then what peak wavelength is observed when the star is traveling 975,000 m/s away from the Earth.

1,379.46

If a star is traveling toward you, its observed spectrum will be ....

Blue-shifted

Which of the following factors are used to determine an ideal observatory location? (Select all that apply.)

Elevation, Seeing, Light pollution, weather

Which of the following planets in our solar system have rings? (Select all that apply)

Uranus, Neptune, Jupiter, Saturn

Which of the four observatories you explored had the worst light pollution?

Griffith Observatory

Which of the following parts of the formal definition of a planet does Pluto fail to meet?

It has cleared the neighborhood around its orbit

As the solar nebula cooled, which compounds were the first to condense from a gas to a solid?

Metals

Which cities would be covered with water if the Greenland Ice Sheet melted completely?

Miami and amsterdam

What initiated the runaway greenhouse effect on Venus?

Venus slowly got closer to the Sun.

Match each term with the appropriate definition

Scarp- a raised ridge on the surface of mercury regolith- pulverized rock that covers the moon Ray- a bright line from crators Maria- Sooth dark regions on the moon Caloris basin- a very large impact crater on mercury olympus mons- the largest mountain ever discovered Mauna Kea - largest mountain on earth measured from the sea floor

Mercury has a network of strange wrinkles across its surface called

Scarps

Sitting on the table is a red book and a blue book. Which one is hotter?

They are probably the same temperature

The discovery of light "beyond the rainbow" is attributed to which scientist?

William Herschel

Kirchoff's Laws suggest that emission lines in a spectrum are caused when ...

You are looking at a hot gas against a dark background

Kirchoff's Laws suggest that a continuous spectrum (plain rainbow) is caused when ...

You are looking at a solid material that has been heated to high temperatures

Kirchoff's Laws suggest that absorption lines in a spectrum are caused when ...

You are looking through a cooler gas toward a bright source of background light

The bright circles around impact craters are called ...

ejecta

In order for an electron to move from one orbit to another, it must ...

emit or absorb light

A gas particle will escape a planet's atmosphere if it moves faster than the ...

escaped speeed

Higher temperatures make the make microscopic atoms and molecules move __________.

faster

An explosion the size of the Tunguska Event is likely to happen every ....

few centuries

The number of waves passing a point each second is the ....

frequency

As the wavelength of a light wave gets bigger, the frequency

gets smaller

What two factors influence whether gas particles stay or leave a planet's atmosphere?

gravity and heat

What factor most helps the Earth maintain a relatively constant temperature?

greenhouse gases

Where did the oxygen in our atmosphere come from?

photosynthesis of living organisms

Which color of visible light has the longest wavelength?

red

What two colors of light would you combine to make the color yellow?

red and green

What are the primary colors of light?

red;blue;green

The surface of the moon is covered with a fine powder of pulverized rock called...

reglith

Each pixel acts kind of like a ...

telescope

The planets closest to the Sun are known as the

terrestrial planets

The exact wavelength of the spectral lines of a gas cloud are determined by ...

the energy levels of the electrons within the gas cloud

Why doesn't Mars have active volcanoes today?

the planet lost its internal heat to cold space

The moon Titan is special because....

the surface is wet

Digital cameras represented a huge improvement over photographic film because...

they capture light more effeciently

Why do astronomers only take black and white images?

to maximize the resolution of their images

Why do astronomers only take black and white images?

to maximize the resolution of their images.

The _________ for discovering exoplanets looks for tiny dips in light as a planet passes in front of its star.

transit method


Conjuntos de estudio relacionados

NU143- Chapter 23: Nursing Care of the Newborn with Special Needs

View Set

6.3 - Financial Goals/Objectives

View Set

Prep-U Chapter 44: Assessment and management of patients with biliary disorders

View Set

"What am I?" Guess the answer to the tricky questions!

View Set