Astronomy Study Stack for Test
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| About how old is the Universe? | 12-14 billion years
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| What is the correct order of the planets from the Sun outward? | Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, (Pluto)
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| How are the colors of visible light placed on the spectrum? | by the wavelength of the light
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| What galaxy do we live in and what shape is it? | Milky Way; spiral
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| What is a constellation? | a grouping of stars
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| Among the Milky Way, the Sun, and Jupiter - which is the largest? | Milky Way
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| Describe the difference between rotation and revolution. | rotation is spinning on an axis; revolution is one body moving around another
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| Who studies the origin and dynamics of the universe? | cosmologist
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| What creates the ocean tides? | the gravity of the Sun and Moon
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| What are the stages of a low mass star? | nebula, protostar, main sequence, giant, white dwarf, black dwarf
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| What is the average distance from the Earth to the Sun? | 93 million miles; 1 AU
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| About how old is the Earth? | 4.5 billion years
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| What is the Sun currently burning and what will it burn in the future? | hydrogen; helium
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| Where is the asteroid belt? | between Mars an Jupiter
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| What is a synonym for luminosity? | brightness
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| Where do stars begin forming? | in a nebula
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| What are the gas giants? | Jupiter, Saturn, Uranus, Neptune
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| What is the nearest star to Earth? | Sun
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| Which planets are covered in liquid and gas? | the gas giants
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| What is a light-year used to measure? | star to star
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| What does the H-R diagram show? | luminosity, stages of stars, surface temperature
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| Why do we always see the same side of the moon? | it rotates at the same rate it revolves
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| What is the heliocentric model? | it states that the Sun is the center of the solar system
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| Who stated the laws of planetary motion? | Kepler
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| What is Earth's current tilt? | 23.5 degrees
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| What determines the eccentricity of a planet's orbit? | the distance between the foci (or focal points for Connor)
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| What order are the energies on the spectrum and what determines where they are placed? | radio waves, microwaves, infrared, visible light, ultraviolet, x-ray, gamma; wavelength
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| Why is Pluto so different from other planets? | it has an inclination; it is highly eccentric; it is smaller than the inner planets
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| What is a comet? | a moving body of dust and ice
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| What stage(s) see the start of burning helium? | giant/surpergiant
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| What is precession? | the wobble of the Earth
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| What relationship exists between a planet's eccentricity and its distance from the Sun? | None
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| What is Kepler's First Law? | All planets orbit in an ellipse with the Sun as one of the foci.
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| What is Kepler's Second Law? | All planets cover equal area in equal time. (Must change speed to do this. The higher the eccentricity, the greater the change in speed.)
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| What is Kepler's Third Law? | The time it takes a planet to complete an orbit is directly related to its distance from the Sun.
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| How will a change in obliquity impact the seasons? | If the tilt is greater, there will be a more extreme change in seasons.
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| What is an AU, light-year, and parsec used to measure? | AU=planet to planet; light-year=star to star; parsec=galaxy to galaxy
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| What part of the spectrum can humans see? | visible light = ROY G BIV
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| What type of energy is radio waves? - gamma? | radio waves are very low energy (harmless); gamma is very high energy (harmful)
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| What will be the end of the road for our star? | black dwarf
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