Kepler's first and Thrid law quick check

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!!!!!!!!!

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

^ 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!

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

Hi Naruto :D

Sure, here are the answers to the questions:

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

1. The best description of Earth's orbit is D. Highly elliptical. To determine this, you can look at the shape of Earth's orbit. Kepler's first law states that planets move in elliptical orbits with the Sun at one of the foci. Hence, the best description is "highly elliptical" as Earth's orbit is not perfectly circular.

2. The statement that describes Kepler's third law of orbital motion is C. The cube of the orbital period is proportional to the square of the semi-major axis. To remember this, you can recall the equation for Kepler's third law: T^2 = k * a^3, where T is the orbital period and a is the semi-major axis.

3. Kepler was first studying Earth's orbit when he began to develop his laws of orbit motion. The answer is A. Earth.

4. The description that represents Kepler's third law of orbital motion is C. T^2 ∝ a^3. This is the equation mentioned in the previous answer. It states that the square of the orbital period is proportional to the cube of the semi-major axis.

5. Most scientists in the early 1600s thought that the planets of our solar system have C. Circular orbits. At that time, the concept of elliptical orbits was not widely accepted. It was Kepler's contributions that demonstrated that planets have elliptical orbits, refuting the earlier idea of perfectly circular orbits.

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