Next in our study of simple machines is the screw.
We discover that a screw is basically a "twisty inclined plane".
We make a model of a screw out of a pencil, a paper triangle,
and a chenille wire.
A little bit of tape helps.
Can you see the twisted chenille wire?
Does it look like a screw?
All the supplies and lab reports have been sent home and the Navigators at home are able to do it at the same time.
It works something like switchbacks in the mountains.
Screws make work easier!
The next day we get out nails and hammers, screws and screwdrivers, and go to work.
We sure had fun making lots of noise!
So much concentration
We discover that it's not as easy to put a screw in a piece of wood.
We discover that a hammer works like a lever, too, and that the lever makes the job of taking out the nail much easier.
Which holds two pieces of cardboard together better?
A nail or a screw?
Fortunately, our hands-on learning experience didn't cause anyone to hammer their thumbs!
Now we see screws everywhere!
light bulbs
water bottles
twisty slides
apple corers
Play-doh toys
pen caps
drills
corkscrews
clamps
bolts
water faucets and hoses
jacks
Archimedes screw
and more!
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