Whats the difference

Discovery

• Finding something out that you did not know about.
• Who discovered that the earth was round

The world is not flat!

• Christopher Columbus
• Today it is well known that the Earth is a sphere, or very close to one (its equator bulges out a bit because of the Earth's rotation). When Christopher Columbus proposed to reach India by sailing west from Spain, he too knew that the Earth was round. India was the source of precious spices and other rare goods, but reaching it by sailing east was difficult, because Africa blocked the way. On a round globe, however, it should also be possible to reach India by sailing west, and this Columbus proposed to do (he wasn't the first one to suggest this--see below). Sometimes the claim is made that those who opposed Columbus thought the Earth was flat, but that wasn't the case at all. Even in ancient times sailors knew that the Earth was round and scientists not only suspected it was a sphere, but even estimated its size.

Invention

• An invention is when someone makes some thing that no one has made or heard of before.
• Who invented the microwave

Microwave

• Percey Spence rinvented themicrowave.
• Spencer worked for a company named Raytheon, developing microwave radar transmitters during World War II. One day in 1945, he noticed that a candy bar he had in his pocket was starting to melt. The microwaves from the radar set he was working on were cooking the candy bar in his pocket! With a little experimentation, Spencer figured out that the microwaves could be concentrated to heat food. He created the first working microwave oven, and the first food he cooked in it was popcorn.

Innovation

• To come up with something that improves that idea, methods and equipment.
• Who iovated the bike?

Tandem bike?

• 1898, Mikael Pedersen developed a two-rider tandem version of his Pedersen bicycle that weighed 24 pounds, and a four-rider, that weighed 64 pounds.