Name 3 things that contain gears.
___________________________

___________________________

___________________________

Look at the red and green gears. Read the paragraph beside it and fill in the blanks.

The two gears rotate in ________________ directions. The smaller gear

of the ______________ between the gears or the __________________.

Look at the two spinning gears. Every time the larger gear goes around

______________ the smaller gear goes around _____________.

Go to  InventorsToolbox: The Elements of Machines to write a description and draw a picture of the following:
 
 

Bevel Gear _________________________________________ _________________________________________ _________________________________________ _________________________________________ _________________________________________ _________________________________________
Worm Gear ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________
Rack and Pinion Gear ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________

Go back to  How Gears Work to write a description and draw a picture of:
 

Planetary Gear ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________