Orbital Motion & Seasons

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 

All objects are attracted to each other by the force of:

• Gravity 
• Inertia 
• Orbital Speed 
• Terminal Velocity 

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

• Venus 
• Earth 
• Saturn 
• Mercury 

As mass increases, gravity ________________.

• Increases 
• Decreases 
• Stays the same 

As mass decreases, gravity ______________________.

• Increases 
• Decreases 
• Stays the same 

As distance increases, gravity __________________.

• Increases 
• Decreases 
• Stays the same 

As distance decreases, gravity ___________________.

• Increases 
• Decreases 
• Stays the same 

Suppose the Moon were closer to Earth.  How would the force of gravity between Earth and the Moon be different?

• There would be no difference 
• There would be a weaker force of gravity between them
• There would be a stronger force of gravity 

Earth’s _______________  causes the seasons.

• Tilted axis   
• Distance from the sun
• Atmospheric conditions
• Global warming

It takes the earth _____ days to make one revolution around the sun.

• 1 day
• 30 days
• 185 ½
• 365 ½ days