Kepler's first and Thrid law quick check

Question

1Which is the best description of Earth’s orbit? (1 point)
A.almost circular
B.parabolic
C.circular
D.Highly elliptical

2. Which statement describes Kepler’s third law of orbital motion? (1 point)
A.The square of the orbital period is proportional to the semi-major axis.
B.The square of the orbital period is proportional to the cube of the semi-. major axis. 
C.The cube of the orbital period is proportional to the square of the semi-major axis. 
D.The orbital period is proportional to the square of the semi-major axis.

3. Which planet Orbit was Kepler first studying when he began to develop his laws of orbit motion
A. Earth
B. Mars
C. Saturn
D. Jupiter

4. Which of these describes Kepler’s third law of orbital motion? (1 point)
A. T3 ∝ a2
B. T ∝ a2
C T2 ∝ a3
D T2 ∝ a

5. Which orbital shape did most scientists in the early 1600s think the planets of our solar system have?
A.  hyperbolic
B. parabolic
C. Circular
D. elliptical

I NEED THE ANSWERS!!!!!!!!!

aly · Accepted Answer

1. Almost Circular 2. The square of orbital period is proportional to the cube of the semi-major axis. 3. Mars 4. Circular 5. T2 ∝ a3

DrBob222 · Answer

You want a quick check so what are your answers so we can check them.

Sky_Puppy · Answer

^ Aly is 100% correct! 5/5! Might not be in the exact order cause the questions were jumbled but just look through the answers and you’ll see which question is which!

Sasuke · Answer

Hi Naruto :D

Nobody · Answer

Questions & Answers maybe mixed up 1. Almost Circular 2. The square of orbital period is proportional to the cube of the semi-major axis. 3. Mars 4. Circular 5. T2 ∝ a3 100% credit goes to aly