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Astronomy > Exam One > Flashcards

Exam One Flashcards

1
Q

What are the coordinates we use for the local sky

A

Altitude and Azimuth

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2
Q

How does the sun rise

A

East to West, due North in summer and due South in Winter

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3
Q

What is our cosmic address

A

Milky Way, Earth

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4
Q

What is Emission

A

A thin, low-density cloud of gas that emits light only at specific wavelength that depends on composition and temperature

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5
Q

What is Absorption

A

A cloud of gas between us and a light bulb that can absorb light of specific wavelengths, leaving dark absorption lines

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6
Q

What is Angular Size

A

How we measure the sky and we estimate with our outstretched hands

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7
Q

What speed does light travel

A

Light travels at a finite speed of 300,000 km/s

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8
Q

How do the stars rise and set

A

The Earth rotates West to East, so the stars rise in the East and set and the West

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9
Q

What is the Doppler Shift

A

Light emitted from an object moving towards you will have it’s wavelength shortened

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10
Q

How do Astronomers use the Doppler Shift

A

Astronomers use the Doppler Shift to tell what part of an object’s motion is moving towards or away from us

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11
Q

What is the REDSHIFT

A

Light emitted from an object moving perpendicular to your line of sight

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12
Q

What is BLUESHIFT

A

Light emitted from an object moving away from you

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13
Q

Types of Energy

A

Kinetic, Radiative, Stored, Potential, Total, Thermal, Concentrated, Orbital, Photon, Gravitational

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14
Q

What is a Light Year

A

The distance a light can travel in one year (6 trillion miles)

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15
Q

Types of Spectra

A

Emission, Continuous, Absorption

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16
Q

How do Astronomers use Spectra

A

To tell which kinds of atoms present

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17
Q

What is Accelerated Motion

A

A point or an object moving in a straight line is accelerated if it speeds up or slows down

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18
Q

What is the relationship between Temperature and Color

A

The hotter the temperatures, the more red/white an object becomes. (Red=Hot, Bright Red= Hotter, White/Glowing= Hottest)

19
Q

What is the difference between the Heliocentric Model and the Geocentric Model

A

Heliocentric=Sun at the center
Geocentric=Earth at the center

20
Q

What does an Astronomical Unit (AU) represent

A

The average distances from the Earth to the Sun

21
Q

Types of Forces

A

Gravity, Normal Force, Electricity, Nuclear, Spring, Tension, Magnetic, Contact, Drag, Friction, Electromagnetism, Air Resistance, Centripetal, Electrostatics

22
Q

Types of Electromagnetic Spectrums

A

Radio Waves, Microwaves, Infrared, Visible Light, Ultraviolet, X-Rays, Gamma Rays

23
Q

Types of Orbits

A

Geostationary, Geosynchronous, Geocentric, Geostationary Transfer, Geosynchronous Earth, Earth, Medium Earth, High Earth, Low Earth, Polar, Near-Equatorial, Sun-Synchronous, Elliptic, Inclined, Circular, Horseshoe, Graveyard

24
Q

The Longer the Wavelength

A

The Less Energy It Has

25
Q

What Causes the Seasons

A

The seasons are caused by the earth’s spin on it’s axis, along with the sun hitting more or less directly on certain areas of the globe

26
Q

Basics of the Telescope

A

Refracting, Reflecting, Catadioptric

27
Q

What are Kepler Laws of Planetary Motion

A

1)Orbit of each planet around the sun is an ellipse

2)As a planet moves, it sweeps out equal areas at equal times

3)Planets travel faster the closer they are to the sun and slower the further they are from the sun

28
Q

Conservation Laws

A

Energy, Mass, Linear, Angular, Electric, Momentum

29
Q

What is Earths axis

A

23.5 Degrees

30
Q

Order of the Rainbow

A

Red, Orange, Yellow, Green, Blue, Indigo, Violet

31
Q

Red Wavelength

A

620-750nm

32
Q

Orange Wavelength

A

590-620nm

33
Q

Yellow Wavelength

A

570-590nm

34
Q

Green Wavelength

A

495-570nm

35
Q

Blue Wavelength

A

450-495nm

36
Q

Indigo Wavelength

A

425-450nm

37
Q

Violet Wavelength

A

380nm

38
Q

Red Energy

A

1.91eV

39
Q

Orange Energy

A

2.06eV

40
Q

Yellow Energy

A

2.14eV

41
Q

Green Energy

A

2.25eV

42
Q

Blue Energy

A

2.75eV

43
Q

Violet Energy

A

3.10eV

44
Q

ROYGBIV

A

Red Orange Yellow Green Blue Indigo Violet

Astronomy (4 decks)

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