Why are there seven days in the week?

Arrange the following objects in order of increasing size:
Group of answer choices
planet, star, galaxy, galaxy cluster, supercluster.
star, planet, galaxy, galaxy cluster, supercluster.
planet, galaxy, star, supercluster, galaxy cluster.
planet, star, supercluster, galaxy cluster, galaxy.
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Question 21 pts
At the time of this writing (2020), the population of the United States is about
three hundred thirty one million, or:
Group of answer choices
3.31 ´ 108
3.31 ´ 107
3.31 ´ 109
3.31 ´ 106
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Question 31 pts
A scientific or pseudoscientific idea both predict what will happen by stating a
hypothesis. A scientific idea
Group of answer choices
like a pseudoscientific idea only needs to be confirmed by a single observer.
is repeatably testable by performing an experiment.
is true regardless of the person testing it.
cannot be proven false, only true.
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Question 41 pts
2.9´104 is the same as
Group of answer choices
2.9 million, 2900000
290 thousand, 290000
29 thousand, 29000
2.9 thousand, 2900
29 million, 29000000
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Question 51 pts
A parsec is a unit of:
Group of answer choices
distance.
angle.
mass.
time.
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Question 61 pts
Scientists refer to a well-developed body of knowledge that has been tested
many times in many different ways as a:
Group of answer choices
truth.
framework.
hypothesis.
theory.
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Question 71 pts
Express 2 ´ 10-3 in everyday language.
Group of answer choices
one-sixth, 1/6
two-tenths, 0.2
two-hundredths, 0.02
two-thousandths, 0.002
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Question 81 pts
What is the order of magnitude for 6.81 x 105 m?
Group of answer choices
105 m
7 m
700000 m
5 m
106 m
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Question 91 pts
The size of the moon is about
Group of answer choices
None of the above
1/2 the size of the Earth
1/10 the size of the Earth
1/4 the size of the Earth
the same as the Earth
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Question 101 pts
Which of the following might be the diameter of a planet?
Group of answer choices
103 m
100 m
1010 m
106 m
The special constellations that the sun passes through in its annual cycle are called
the
Group of answer choices
terrestrial constellations
Zodiac constellations
celestial constellations
solar constellations
lunar constellations
Question 21 pts
Why are there seven days in the week?
Group of answer choices
There were seven oceans in the old world.
Seven is a lucky number.
Originally there were 6 days in a week, but Julius Ceasar ordered that he should have
one day per week added in his name.
There are seven colors in the rainbow.
There were seven celestial objects observed by ancient people moving through the
stars; the sun, the moon and the five bright visible planets.
Assume that the North Pole is the top pole for each of the Earths. Which of the above
positions is the Summer Solstice in the Southern Hemisphere?
Group of answer choices
C
D
A
B
Question 41 pts
You observe a lunar eclipse. What phase is the Moon during a lunar eclipse?
Group of answer choices
third quarter
full
first quarter
new
Question 61 pts
The _______________ of the moon is the period of time for the moon to complete
a cycle of the lunar phases and is approximately 29.5 days long.
Group of answer choices
umbral period
eclipse season
synodic period
sidereal period
Question 71 pts
When it is summer in the Southern Hemisphere it is
Group of answer choices
spring in the Northern hemisphere.
either summer or winter in the Northern hemisphere depending on the year.
winter in the Northern hemisphere.
fall in the Northern hemisphere.
summer in the Northern hemisphere.
Question 81 pts
During the month of June the north celestial pole points towards Polaris but during
the month of December it points
Group of answer choices
towards the star Thuban.
towards the star Vega.
just south of Polaris.
just north of Polaris.
still towards Polaris.
Question 91 pts
Assume that the North Pole is the top pole for each of the Earths. Which of the above
positions is the Vernal Equinox in the Northern Hemisphere?
C
A
D
B
Question 101 pts
The lunar orbit is tilted by how much to the ecliptic plane? This means that the
Moon only passes through the ecliptic two times per month at the nodes.
Group of answer choices
29.5 degrees.
23.5 degrees.
10 degrees.
5 degrees.
0 degrees, it is not tilted.
Question 11 pts
Which of the following phenomena is primarily due to the elliptical shape of Earth’s
orbit?
Group of answer choices
the changing lengths of days
none of the above
the seasons
the changing of the Sun’s altitude at noon
Question 21 pts
In the heliocentric model, the retrograde motion of a planet occurs when:
Group of answer choices
a planet travels along an epicycle in the opposite sense of its usual orbit.
a faster planet passes a slower planet in its orbit.
a planet’s velocity changes as it moves nearer to or farther from the Sun.
Earth is moving along its orbit on the opposite side of the Sun from another planet.
Question 31 pts
According to Kepler’s first law, the planets travel on
Group of answer choices
elliptical paths with the sun at one foci and an anti-sun at the other foci.
circular paths with the sun at the center.
elliptical paths with the sun at one foci and nothing at the other.
elliptical paths with the sun at the center.
Question 41 pts
In the heliocentric model, the retrograde motion of a planet occurs when:
Group of answer choices
a planet’s velocity changes as it moves nearer to or farther from the Sun.
a planet travels along an epicycle in the opposite sense of its usual orbit.
Earth is moving along its orbit on the opposite side of the Sun from another planet.
a faster planet passes a slower planet in its orbit.
Question 51 pts
According to Newtonian mechanics, an extrernal force acts on a mass with a strength
(magnitude) and direction. Which direction will the mass accelerate as a result of this
force?
Group of answer choices
perpendicular to the direction of the force
the opposite direction as the force
the same direction as the force
none of the above
uestion 61 pts
The astronomer who made the most sophisticated and accurate naked-eye
measurements of astronomical objects was:
Group of answer choices
Tycho Brahe
Hipparchus
Johannes Kepler
Galileo Galilee
Question 71 pts
Which of the following planets will undergo retrograde motion?
Group of answer choices
All three: Mercury, Venus and Mars.
Mars only.
Mercury only.
Venus only.
Both Mercury and Venus.
Question 81 pts
When a rocket flies in space away from the Earth (outside the atmosphere of the Earth),
what force is “pushing” the rocket forward and causes it to accelerate?
Group of answer choices
The gravitational attraction to the Earth.
The force of the gases on the rocket as they come out of the back of the rocket.
The force of the rocket on gases coming out of the back of the rocket.
The gravitational attraction to the sun.
Question 91 pts
The point in Earth’s orbit where Earth is farthest from the sun is known as
Group of answer choices
perihelion.
a and d.
the winter solstice.
aphelion.
precession.
Question 101 pts
An object is moving with a speed in a certain direction, so it is said to have a velocity.
What will happen to an object that “accelerates” according to physics?
Group of answer choices
It can either speed up OR slow down AND/OR change direction and it is still called
acceleration.
It will change direction.
It will slow down.
It will speed up.

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