Which planet in our solar system will have the fastest orbital  speed?

• Venus 
• Earth 
• Saturn 
• Mercury 

The tendency of a moving object to continue moving in a straight line or a stationary object to remain in place is called:

• Orbital Speed 
• Gravity 
• Terminal Velocity 
• Inertia 

As mass increases, gravity ________________.

• Increases 
• Decreases 
• Stays the same 

As distance decreases, gravity ___________________.

• Increases 
• Decreases 
• Stays the same 

What are the factors which combine to to keep celestial bodies in orbit? 

• Air Resistance and Gravity 
• Gravity and Inertia 
• Inertia and orbital speed
• Orbital speed and gravity 

What did Kepler discover about planets and their orbital speed?

• Planets closest to the Sun will orbit with the fastest orbital speed.
• Planets with the greatest mass will orbit the Sun with the fastest orbital speed.
• Planets furthest from the Sun will orbit with the fastest orbital speed.
• Planets with the least mass will orbit the Sun with the fastest orbital speed.

According to Kepler’s discoveries, planets orbit around the Sun:

• in an oval shape.
• in perfect circles.
• in an ellipse.
• in a rectangular shape.

The Earth is closest to the Sun during _______. 

• aphelion

• perihelion

If it takes the object the same amount of time to move between each dot/letter, 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

It takes an object 5 months to move from point A to point B. How long will it take the object to move from point G to point J if each purple/white "triangle" have the same areal?

• 18 months

• 6 months

• 2 months

• 6 years