Module 13

1. Yo-yo's have been used as a toy for over 2,500 years. From which language does the word yo-yo come from and what does it mean?
The word "yo-yo" may come from Tagalog language (the language of the Philippines), meaning "to come back."
source: http://www.enchantedlearning.com/inventors/indexy.shtml

2. What are mobiles?
Mobiles are dangling sculptures that hang as decoration, art, or an educational tool.
source: http://www.wisegeek.com/what-are-mobiles.htm

3. When was the can opener invented?

The can opener was invented in 1858 by Ezra Warner of Waterbury.
source: http://www.enchantedlearning.com/inventors/1800a.shtm

4. What was invented by GM engineers Clyde Coleman and Charles Kettering?
The first electrical ignition system or electric starter motor for cars was invented by GM engineers Clyde Coleman and Charles Kettering.
source: http://inventors.about.com/library/inventors/blignition.htm

5. Who invented hovercrafts?
The hovercraft was invented by Christopher Cockerell in 1956.
source: http://inventors.about.com/library/inventors/blhovercraft.htm