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All of the above
The acceleration of the object is zero.
The velocity of the object is constant.
The acceleration of the object is toward the center of motion.
The angular momentum of the object is zero.
The speed of the object is changing.
The diameter of Earth.
The diameter of the moon.
The distance from Earth to the Sun.
The diameter of the Sun.
The phases of the Moon cycle with a period that is longer than its siderial period
The observed phase of the Moon changes over the course of one night
Everyone on Earth observes the same phase of the Moon on a given night
In some phases, the Moon can be observed during the day
Sun, Earth, solar system, Galaxy
Earth, Sun, Galaxy, solar system
Earth, Sun, solar system, Galaxy
Earth, Galaxy, Sun, solar system
Decreases in brightness as it passes through the Earth's shadow
Slows down because it feels the Earth's gravitational pull
Exhibits retrograde motion
Moves into a more elliptical orbit
The same time
He developed a theory of gravity that could explain orbital motion.
He said that the Earth is not at the center of the universe.
He discovered that the planets move around the Sun in elliptical orbits.
He used a telescope to observe the heavens, thereby reinforcing the moiton of heliocentricity.
He made extensive and detailed observations of the positions of planets.
The orbital sspeed of each planet is constant.
The orbital speed of a planet varies in no predictable way.
A planet moves at its fastest when it is closest to the Sun.
A planet moves at its slowest when it is closest to the Sun.
The force must be attractive.
The force must be repulsive.
The force must vary inversely with distance.
The force must vary inversely with distance squared.
Both a and d above.
The Earth's northern hemisphere is tilted toward the Sun
The Earth's northern hemisphere is tilted away from the Sun
The Earth is closer to the Sun
Better access to high energy radiation such as ultraviolet light and X-rays
Better access to low energy radiation such as infrared and microwave radiation
Avoids the blurring of images caused by the Earth's atmosphere
All of the above
South celestial pole
Stages of heaven
Signs of the zodiac
Nodes of the ecliptic
The Moon's orbit is elliptical
Earth is far more massive than the Moon
The Sun is far more massive than the Moon
Earth's orbit around the Sun is elliptical
Inside stars and supernovae
In the early universe
In the core of Earth
The Moon always keeps the same side turned toward the Earth
The Moon's orbit is tilted with respect to the Earth's rotational axis
The Earth must rotate so an observer can see the Moon
The Earth moves significantly in its orbit around the Sun during that time
Rotational period of the Moon equals the orbital period of the Moon around the Earth
Rotational period of the Moon equals the rotational period of the Earth
Rotational period of the Moon equals the orbital period of the Earth around the Sun
Moon does not rotate as it orbits the Earth
A unique center of the universe exists
The universe looks the same everywhere as long as you look on large enough spatial scales
Physical laws may change from place to place in the universe
The universe is expanding in all directions at the same rate
An accurate model that can be used to predict the motion of the planets.
Can be used to predict the position of the stars and planets for up to 1000 years in the future.
Assumes that all of the stars are at different distances from the Earth.
A convenient model that can be used to explain the motion of the stars on a daily basis.
None of the above.
The Earth's axis of rotation is tilted from its orbital axis
The Earth moves closer and farther from the Sun
The Earth is a sphere
The Earth spins on its axis
Included elliptical orbits.
All of the above.
None of the above.
It is located directly overhead for everyone on Earth.
It is too nearby for its motion to be discernible.
It lies approximately over the northern axis of the Earth
The stars are fixed relative to each other.
Eventually come to rest
Experience a nonzero acceleration
Experience an unbalanced force
Stay in motion
At third quarter and full moons
At first quarter and third quarter moons
At noon and midnight
At new moon and first quarter moon
At new moon and full moon
A moon named Europa
First quarter phase
Third quarter phase
None of these
1 (no change)
Increase by 2
Decrease by 2
Decrease by 4
Increase by 4
Inner planets orbit the Sun faster and pass outer planets as they orbit around the Sun
Each planet moves on an epicycle, that in turn moves on a deferent that circles around Earth
None of these
The Sun and Moon orbit Earth, whereas all the other planets orbit the Sun
Planets slow down, stop, and then reverse their orbital direction around the Earth
It changed the perfect circles to ellipses.
It added epicycles to the perfect circles.
It placed the Sun at one focus of each orbit.
Answers a and c above.
Answers b and c above.
Toward the Moon
Away from the center of the Earth
Away from the Moon
Toward the center of the Earth
About three to four days
Nearly vertically upward nearly vertically upward
From left to right
From right to left
Away from her hand along a radius in a curved path.
Away from her hand along a tangent in a straight line.
Away from her hand along a radius in a straight line.
Away from her hand along a tangent in a curved path.
The amount of force on Earth by the Sun is greater by the ratio of the Sun's mass to Earth's mass.
It is impossible to compare these two vastly different amounts of force.
The amount of force on the Sun by Earth is the same as the amount of force on Earth by the Sun.
The amount of force on the Sun by Earth is greater by the ratio of the Sun's mass to Earth's mass.
The amount of force on the Sun by Earth is negligible.
Hypothesis; scientific method
Theory; scientific revolution
When the sun is near the line of nodes of the Moon and the Moon is new or full
When the sun is near the solstice and the Moon is new or full
When the sun is near the equinox and the Moon is new or full
Half-way through an eclipse year
Any time the Moon is new or full
An annular solar eclipse
A penumbral solar eclipse
A total solar eclipse
A partial solar eclipse
Time required for light to travel from Earth to Sun
Distance from the Earth to the Sun
Distance light travels in one year
Distance around the Earth's orbit
A single star and planets
Large amounts of gas, dust, and stars
Thousands of superclusters
Large amounts of gas and dust but very few stars