Which of these describes Kepler’s third law of orbital motion?(1 point)
Responses
T2∝a
T2∝a
T3 ∝a2
T3 ∝a2
T2 ∝ a3
T2 ∝ a3
T∝a2
T2 ∝ a3
Which orbital shape did most scientists in the early 1600s think the planets of our solar system have?(1 point)
Responses
circular
circular
hyperbolic
hyperbolic
parabolic
parabolic
elliptical
elliptical
circular
Which planet’s orbit was Kepler first studying when he began to develop his laws of orbital motion?(1 point)
Responses
Jupiter
Jupiter
Mars
Mars
Earth
Earth
Saturn
Mars
Which statement describes Kepler’s third law of orbital motion?(1 point)
Responses
The square of orbital period is proportional to the semi-major axis.
The square of orbital period is proportional to the semi-major axis.
The orbital period is proportional to the square of the semi-major axis.
The orbital period is proportional to the square of the semi-major axis.
The square of orbital period is proportional to the cube of the semi-major axis.
The square of orbital period is proportional to the cube of the semi-major axis.
The cube of orbital period is proportional to the square of the semi-major axis.
The square of orbital period is proportional to the cube of the semi-major axis.
Which is the best description of Earth’s orbit?(1 point)
Responses
parabolic
parabolic
highly elliptical
highly elliptical
circular
circular
almost circular
almost circular
Multiple Choice
Which of the following is an example of subjunctive verb mood?
(1 point)
Responses
Going outside in your bare feet could make you cold.
Going outside in your bare feet could make you cold.
Will you go away?
Will you go away?
If I make the baseball team, I will skip around the field.
If I make the baseball team, I will skip around the field.
The bread was old and crusty.