Use the links below to find the answers to your questions about Classroom Inventions.
 
 

1.                were invented in the late 1800s after the development of thin steel wire and machines that could stretch, bend and twist it.
 

2.   In the late 1500's, an eyeglasses maker invented the first                 .  It consisted of one tube inside another, with a lens at each end.

3. A _________ gets its name from the small rotating ball made out of brass, steel, or tungsten carbide that makes it work.

4 .___________, invented in 1903, are made out of pigment and paraffin wax melted together in a mold, then quickly cooled.

5. In the 1700's, the first ________was made out of natural rubber.  Today, they are usually made out of a synthetic rubber compound or vinyl.

6. A _______ is one of the oldest classroom inventions.  Originally painted wood, they were later created from slate, a type of stone.

7. The invention of ________ in 1980 finally put to good use a special "low tack," reusable adhesive that had been created years earlier in 1968.l

8. In 1897, the first simple _________was invented.  It was later followed by fancier models that used sandpaper, a wheel cutter, or a file to do the job.