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cross bows
Crossbows were made over 2000 years ago. They fired meatal blots or short arows. They were slow at shooting, no faster than a long bow. But in battels speed was important they were mostly beaten by long bows. -
Battery
A battery powers other machines such as computers and many other machines. Andro volta invented the battery in 1800. Batterys are very important. We'd be lost without batterys. -
Light Bulb
The first eletric light made was by Davy Humphry. He also invented electricity. When he conected batterys to a wire it glowed. He had Just invented a light bulb. Much later in 1860 Joseph Wilson swan upgraded the light bulb to a long-lasting light bulb. -
Gunpowder
Gunpowder was used for warfare in china. It was also made in 1856. It was probuly invented in the 1000's. Gunpowder is made of75% of salpter'15% powderd chorcoal'and 100% sulpher. -
Gyroscope
A Gyroscope is a one-whelled-bycicle sorta. Gyroscopes used to be used for blasting of rockets and canons. They were made in 1856. -
Smoke alarm
The first smoke alarm was made in 1967. It warned people of fires . It saved many lives from dieing from a fire. They are super expensive. -
Basketball
James Naismith invented the game basketball as a game that could be played in the winter. The first game was played in massichuses. He used a soccer ball and peach baskets for the goal and ball. -
Microscope
Microscopes makes it were we can see stuff 10000 times bigger.A German, Ernest Ruska invented the first electron micoscope in 1933. It made things 12,000 times thier actual size. -
Catupult
A catapult hurls large objects over a large distance. It was made by Dionysios the elder of syracuse. It was made in 399 BC in anient greece. -
compass
The earlyest compass was made by Han Dynasty. It was improved in 2nd centery BC and 2nd centrey Ad. It is made magnetic. i
