Sawing – 7th Grade Tech

A little over a week ago, in tech, we used slice precision cutters to cut through balsa wood. You use them to cut with the grain. These tools don’t cut fully through the wood though, we’d have to snap the piece into two like a Kit Kat. This was just so that we learned how to use them.

Last Tuesday, we used mini saws instead of slice precision cutters. Unlike the slice precision cutters, these saws have over two hundred teeth, can cut fully through the wood, and you use them to cut against the grain. At first, I used the saw like a knife and pressed down on it, but when using this type of saw, you’re not supposed to do that. You move it back and forth, letting the teeth do the job. When I tried this, it was much easier and the saw cut through the wood smoothly.

I really liked testing these two tools out and I’m excited to start using them for projects!

Slice precision cutter:

Mini saw:

Timber Harvest – 7th Grade Tech

Back in 1947, we didn’t have the technology we have today. Many steps in the process of harvesting timber were done manually. In the second and third videos, which were about how it’s done currently, almost every step was accomplished using machines.

I learned a lot about redwood from the first video. I was surprised, I didn’t know that they’re so big, and that they can live for so many years! Coast redwood can live up to 2000 years, grow up to 300 feet, and have up to a 20 foot base! The video also mentions another type of redwood that’s bigger and can live even longer! Redwood trees are really incredible.

Something that I found interesting was that it looks like the types of trees we used changed over time. In the first video, redwood trees were used, but it looks like in the second and third videos, smaller and thinner types of trees were used.

These videos showed me the evolution of harvesting timber.