Section #: 29.1
Overview of Our Solar System
Practice Test
1.
What explains why the Sun governs the motion of all planets in our solar system?
SC.E.1.4.1
a.
the law of universal gravitation
b.
retrograde motion of planets
c.
telescopic observations of the planets
d.
Kepler's third law
Hint
2.
What is the Sun-centered model of our solar system called?
SC.E.1.4.1
a.
epicycle
b.
heliocentric
c.
geocentric
d.
eccentric
Hint
3.
The eccentricity of a perfect circle is __________ and a very elongated ellipse is __________.
SC.E.1.4.1
a.
one, zero
b.
zero, nearly one
c.
nearly zero, one
d.
zero, one
Hint
4.
What is the distance between the Sun and Earth called?
SC.E.1.4.1
a.
1 mile
b.
1 astronomical unit
c.
1 light year
d.
1 year
Hint
5.
The __________ of a planet is its apparent backwards movement as seen from Earth's sky.
SC.E.1.4.1
a.
perihelion
b.
eccentricity
c.
epicycle
d.
retrograde motion
Hint
6.
When a planet is closest to the Sun it is at __________.
SC.E.1.4.1
a.
1 AU
b.
perihelion
c.
aphelion
d.
an epicycle
Hint
