Orbital Motion Test Review

Organize these options into the right categories

Groups:

(a) True

,

(b) False

• Planets that are closer to the sun have a shorter planetary year.

• At a planet’s perihelion, it travels slowest in its orbit.

• All space objects in the solar system

  travel at a constant speed.

• A planet’s distance from the sun doesn’t impact its length of year.

• The distance between a planet and the

  Sun impacts a planet’s orbital period.

• All 8 planets orbit around the sun in an elliptical shape.

Match the following

Groups:

(a) Kepler's 1st Law

,

(b) Kepler's 2nd Law

,

(c) Kepler's 3rd Law

• A planet’s orbit around the Sun is an

  elliptical shape.

• An outer planet will have a longer orbital

  revolution around the sun.

• The speed of a planet in its orbit varies.

• A planet will travel slowest at its

  aphelion.

• A planet travels faster in its orbit when it

  is closer to the sun.

• Perihelion is a point in a planets orbit

  when its closest to the sun.

• A planet’s orbital period depends on its

  distance from the sun.

• Aphelion is a point in a planets orbit

  when its farthest from the sun.

• Mercury takes a shorter time period to

  orbit the sun because it is the closest.

The Earth has an eccentricity of 0.0167 as it orbits around the Sun. Which diagram is the best representation of the orbit of the Earth around the Sun?

• 
• 
• 

From which options below would the planet appear to be moving the fastest?

• Position A to B

• Position B to C

• Position H to I

• Position I to J

What is true about the area between points A, B and the Sun, and the area between points H, I and the Sun?

• The area between A, B and the Sun is the largest.
• The area between H, I and the Sun is the largest
• Both areas are equal in size
• There is not enough information to determine the areas

The animation below illustrates Kepler's __________ law.

• first

• second

• third

The animation below illustrates Kepler's __________ law.

• first

• second

• third

Calculate the eccentricity of this planet.

• 5.4

• 0.67

• 0.25

• 0.19

When is the Earth moving the fastest?

• July

• November

• January

• February

Which planet orbits the fastest around Star A?

• Planet X

• Planet Y

• Planet Z