10517890
Descripción
Test por Rachelle Sappington, actualizado hace más de 1 año
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Creado por Rachelle Sappington
hace casi 7 años
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Pregunta 1
Pregunta
Roughly how many Earths would fit inside the Sun?
Respuesta
-
1
-
100
-
10,000
-
1,000,000
Pregunta 2
Pregunta
In 1 second, light leaving Los Angeles reaches approximately as far as
Respuesta
-
San Francisco, about 500 km
-
London, roughly 10,000 km
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the Moon, 384,000 km
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Venus, 45,000,000 km from Earth at closest approach
Pregunta 3
Pregunta
If Earth rotated twice as fast as it currently does, but its motion around the Sun stayed the same, then
Respuesta
-
the night would be twice as long;
-
the night would be half as long
-
the year would be half as long
-
the length of the day would be unchanged
Pregunta 4
Pregunta
When a thin crescent of the Moon is visible just before sunrise, the Moon is in its
Respuesta
-
waxing phase
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new phase
-
waning phase
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quarter phase
Pregunta 5
Pregunta
If the Moon's orbit were a little longer, solar eclipses would be
Respuesta
-
more likely to be annular
-
more likely to be total
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more frequent
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unchanged in appearance
Pregunta 6
Pregunta
Relative to the stars, as seen from Earth, through roughly how many degrees, arc minutes, or arc seconds does the Moon move in 1 hour of time?
Respuesta
-
10 degrees
-
30 arc minutes
-
1 arc minute
Pregunta 7
Pregunta
The Moon lies roughly 384,000 km from Earth, and the Sun lies 150,000,000 km away. If both have the same angular size as seen from Earth, roughly how many times larger than the Moon is the Sun?
Respuesta
-
400
-
40
-
10
-
4
Pregunta 8
Pregunta
The stars in a constellation are physically close to one another.
Respuesta
- True
- False
Pregunta 9
Pregunta
The seasons are caused by the precession of Earth's axis.
Respuesta
- True
- False
Pregunta 10
Pregunta
If the direction of Earth's rotation were reversed, the solar day would be shorter than it is now.
Respuesta
- True
- False
Pregunta 11
Pregunta
The Moon does not rotate.
Respuesta
- True
- False
Pregunta 12
Pregunta
A lunar eclipse can occur only during a full Moon.
Respuesta
- True
- False
Pregunta 13
Pregunta
The angular diameter of an object is inversely proportional to its distance from the observer.
Respuesta
- True
- False
Pregunta 14
Pregunta
Once proved, a theory can never be changed.
Respuesta
- True
- False
Pregunta 15
Pregunta
The [blank_start]universe[blank_end] is the totality of all space, time, matter, and energy.
Respuesta
-
universe
Pregunta 16
Pregunta
[blank_start]Astronomy[blank_end] is the study of the universe.
Respuesta
-
Astronomy
Pregunta 17
Pregunta
Planet [blank_start]Earth[blank_end] orbits a star called the [blank_start]Sun[blank_end], near the edge of the [blank_start]Milky[blank_end] [blank_start]Way[blank_end] Galaxy, which is just one among billions of galaxies in the [blank_start]universe[blank_end].
Respuesta
-
Earth
-
Sun
-
Milky
-
Way
-
universe
Pregunta 18
Pregunta
Early observers grouped the thousands of stars visible to the naked eye into patterns called [blank_start]constellations[blank_end], which they imagined where attached to a vast celestial sphere centered on Earth.
Respuesta
-
constellations
Pregunta 19
Pregunta
A [blank_start]celestial[blank_end] [blank_start]sphere[blank_end] is an imaginary sphere surrounding Earth to which all objects in the sky were once considered to be attached.
Respuesta
-
celestial
-
sphere
Pregunta 20
Pregunta
[blank_start]Constellations[blank_end] have no physical significance, but are still used to label regions of the sky.
Respuesta
-
Constellations
Pregunta 21
Pregunta
The points where Earth's axis of rotation intersects the celestial sphere are called the north and south [blank_start]celestial[blank_end] [blank_start]poles[blank_end].
Respuesta
-
celestial
-
poles
Pregunta 22
Pregunta
The line where Earth's equatorial plane cuts the celestial sphere is the [blank_start]celestial[blank_end] [blank_start]equator[blank_end].
Respuesta
-
celestial
-
equator
Pregunta 23
Pregunta
The nightly motion of the stars across the sky is the result of Earth's [blank_start]rotation[blank_end] on it axis.
Respuesta
-
rotation
Pregunta 24
Pregunta
A [blank_start]rotation[blank_end] is the spinning motion of a body about on its axis.
Respuesta
-
rotation
Pregunta 25
Pregunta
The time from one noon to the next is called a [blank_start]solar[blank_end] day.
Respuesta
-
solar
Pregunta 26
Pregunta
The time between successive risings of any given star is one [blank_start]sidereal[blank_end] day.
Respuesta
-
sidereal
Pregunta 27
Pregunta
Because of Earth's [blank_start]revolution[blank_end] around the Sun, we see different stars at night at different times of the year, and the Sun appears to move relative to the stars.
Respuesta
-
revolution
Pregunta 28
Pregunta
The Sun's apparent yearly path around the celestial sphere (or the plane of Earth's orbit around the Sun) is called the [blank_start]ecliptic[blank_end].
Respuesta
-
ecliptic
Pregunta 29
Pregunta
We experience [blank_start]seasons[blank_end] because Earth's rotation axis is inclined to the ecliptic plane.
Respuesta
-
seasons
Pregunta 30
Pregunta
At the [blank_start]summer[blank_end] [blank_start]solstice[blank_end], the Sun is highest in the sky and the length of the day is greatest.
Respuesta
-
summer
-
solstice
Pregunta 31
Pregunta
At the vernal and autumnal [blank_start]equinoxes[blank_end], Earth's axis of rotation is perpendicular to the line joining Earth to the Sun, so day and night are of [blank_start]equal[blank_end] length.
Respuesta
-
equinoxes
-
equal
Pregunta 32
Pregunta
The interval of time from one vernal [blank_start]equinox[blank_end] to the next is one [blank_start]tropical[blank_end] year.
Respuesta
-
equinox
-
tropical
Pregunta 33
Pregunta
[blank_start]Precession[blank_end] is the slow "wobble" of Earth's axis due to the influence of the [blank_start]Moon[blank_end].
Respuesta
-
Precession
-
Rotation
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Revolution
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Moon
-
Sun
Pregunta 34
Pregunta
As a result of [blank_start]precession[blank_end], the [blank_start]sidereal[blank_end] year is slightly longer than the [blank_start]tropical[blank_end] year, and the constellations migrate around the calendar over the course of thousands of years.
Respuesta
-
rotation
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precession
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revolution
-
tropical
-
sidereal
-
tropical
-
sidereal
Pregunta 35
Pregunta
The [blank_start]Moon[blank_end] emits no light of its own, but instead shines by reflected sunlight.
Respuesta
-
Moon
-
North Star
Pregunta 36
Pregunta
As the Moon orbits Earth, we see [blank_start]lunar[blank_end] phases as the amount of the Moon's sunlit face visible to us varies.
Respuesta
-
lunar
Pregunta 37
Pregunta
At [blank_start]new[blank_end] Moon, the Moon and the Sun are in nearly the same part of the sky, and the [blank_start]sunlit[blank_end] side of the Moon is oriented away from us.
Respuesta
-
new
-
full
-
sunlit
-
dark
Pregunta 38
Pregunta
At [blank_start]full[blank_end] Moon, the Sun and Moon are in opposite directions, from our perspective.
Respuesta
-
new
-
full
Pregunta 39
Pregunta
The time taken for the Moon to complete one orbit relative to the stars is 1 [blank_start]sidereal[blank_end] month. The time needed for the Moon to complete one cycle of phases is 1 [blank_start]synodic[blank_end] month.
Respuesta
-
synodic
-
sidereal
-
synodic
-
sidereal
Pregunta 40
Pregunta
A [blank_start]lunar[blank_end] eclipse occurs when the Moon enters Earth's shadow.
Respuesta
-
solar
-
lunar
-
total
-
partial
-
annular
Pregunta 41
Pregunta
A [blank_start]solar[blank_end] eclipse occurs when the Moon passes between Earth and the Sun.
Respuesta
-
solar
-
lunar
-
total
-
partial
-
annular
Pregunta 42
Pregunta
An eclipse may be [blank_start]total[blank_end] if the body in question (Moon or Sun) is completely obscured, or [blank_start]partial[blank_end] if only a portion of the surface is affected.
Respuesta
-
solar
-
lunar
-
total
-
partial
-
annular
-
solar
-
lunar
-
total
-
partial
-
annular
Pregunta 43
Pregunta
If the Moon happens to be too far from Earth for its disk to completely hide the Sun, an [blank_start]annular[blank_end] eclipse occurs.
Respuesta
-
solar
-
lunar
-
total
-
partial
-
annular
Pregunta 44
Pregunta
Because the Moon's orbit around Earth is slightly inclined with respect to the [blank_start]ecliptic[blank_end], solar and lunar eclipses do not occur every [blank_start]month[blank_end].
Respuesta
-
ecliptic
-
month
Pregunta 45
Pregunta
The [blank_start]scientific[blank_end] [blank_start]method[blank_end] is a methodical approach employed by scientists to explore the universe around us in an objective manner.
Respuesta
-
scientific
-
method
Pregunta 46
Pregunta
A [blank_start]theory[blank_end] is a framework of ideas and assumptions used to explain some set of [blank_start]observations[blank_end] and construct theoretical models that make [blank_start]predictions[blank_end] about the real world. These predictions in turn are [blank_start]amenable[blank_end] to further observational [blank_start]testing[blank_end]. In this way, the theory expands and [blank_start]science[blank_end] advances.
Respuesta
-
theory
-
observations
-
predictions
-
amenable
-
testing
-
science
Pregunta 47
Pregunta
Observation, theory, and testing are the cornerstones of the [blank_start]scientific[blank_end] [blank_start]method[blank_end].
Respuesta
-
scientific
-
method
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