inventions

When was Paper invented?

• in the 4th century AD

• In the 2nd century BC

• In the 1st century AD

Without paper, we wouldn't have............, .................................. and books.

Before the compass sailor depended on landmarks or even the.......... to navigate their ships

The compass made navigation easier and.......

• more adventurous

• hectic

• safer

In prehistoric times ice was used to prevent food from..............and developing bacteria

• warming

• spoiling

• altering

The invention of the refrigerator transformed we eat and...........

Who invented the printing press

• Alexander Fleming

• Samuel Morse

• Nicola Tesla

• Johannes Gutenberg

Plumbing improved our life as it lengthens our .............

Instead of relying on................as a transportation people traveled across country via steam engine.

When was the wheel invented?

• 4th century

• 2nd century

• 6th century