Science 7 – Thursday, December 8
Now that we have seen electrostatics, we have seen how high voltage direct current is created through friction. Electrostatics may appear powerful, but the current is normally very low and inconsistent. In order to power a motor or a device, you must have a constant current source. This is where batteries and DC generators come into play.
In the 19th Century – Thomas Edison was a American businessman and inventor that proposed that DC current was the only way to make electric lighting possible after he invented the electric light bulb. On the other side of the world Serbian-born Engineering student and Inventor Nikola Tesla was also looking at ways to make Electricity more accessible to the public. Nikola Tesla believed that DC current was a very poor choice for long distance transmission, but real power came from a new form of current or alternating current (AC).
We are working on a live demonstration of a twin 235,000 volt Van De Graaf generator. Running these two generators will produce a very strong 475,000 volt electrostatic field! This is strong enough to demonstrate levitation, hair raising experiments, corona discharge, Saint Elmo’s fire and scaled lightning effects. This should be a fun experience!
Applied Technology 7 – Safety Week 2
- Safety – GHS symbols for WHMIS 2015
2. Demo on propellants outside.
- NRCan rules and regulations – rocketry/motors/igniters etc.
- What is a propellant class C energetic material?
- What is an Oxidizer?
- What is the safe way to handle igniters and rocket motors?
3. Demo on launcher set up, ignition system, fusing and live firing of a small rocket.
Wood Working 8
eBooks for Wood Working 8-1, 8-2
As promised, I have created a PDF copy of some project books that are critical to class. You can view these books on your smartphone, tablet or home computer. You will need a passcode to open each book. Please send me a “contact me” with your email and I will send you the code for your references.
We are starting off our Electricity and Magnetism unit this week. Our first topic is Electrostatics, which is part of direct current (DC). This is a naturally occurring electric current that is created by friction and weather-based phenomenon. The topic that we are currently investigating is Lightning – one of the most powerful forces of nature.
We will be doing our in class work – based on the video below from National Geographic
Our work on this video will be done via Google Classroom by following the link below.
>>>> Google Classroom
You must be signed in with Google Chrome to access Google Classroom.
Welcome to Term 2
Applied Tech 6, 7 and Wood Working 8
Welcome to class!
Here is the course outline and project fee information sheet that will be handed out in class. Should you loose your copy, please refer here for your digital copy (PDF format).
Here is a quick look at some of our projects from Gr.6-8 from last term:
Today, we will be going over some of the unique equipment and resources for our upcoming unit projects. Before we get into any construction, we first have to understand the safety component to this course, which is extremely important! No student may work on the industrial tools or handle any hazardous materials until they have cleared the safety component of the course. This is written in Ministry of Education of BC regulations and WCB standards. Also we have a Federal regulations on hazardous materials to cover as well. Safety is critical and mandatory!
Each student must prove his/her competency on the following tools for Grade 7 & 8:
- Mitre saw
- Band saw
- Drill press
- Wood lathe
- Industrial belt sander
Recognition of WHMIS 2015 / UN DOT hazard symbols that can be seen below.