May 05, 2019 Filed in: Articles
Tim McCarthy, Teacher, St. Ignatius of Loyola Catholic Secondary School
Controlled experiments with three factors are a great way for physics students to practice identifying and testing factors that may affect a situation. They provide an excellent opportunity to practice the Scientific Investigation Skills found in Strand A. The students are provided with a situation, brainstorm possible factors that may affect the situation, reduce the list of factors to three that can be tested in the physics lab, develop hypotheses, design procedures to test the factors, test the factors, analyze the data, perform experimental error analysis, and draw conclusions on the effects the three factors have had on the original situation.
My struggle has been to find situations that easily fit this format and that also match the curriculum specific expectations. I have created one three-factor controlled experiment for each of the six units in my 12C physics course. The three-factor experiment in the first unit is used as assessment for learning (formative) to teach the students how to do a controlled experiment. The remaining five experiments are used as assessment of learning (summative). Simulations are used for some experiments as I do not have the necessary equipment to perform all them in the lab. Read More...
November 03, 2018 Filed in: Articles
Chris Meyer, President, Ontario Association of Physics Teachers
Here is a rich problem solving activity that I use when introducing the five equations of constant acceleration with my grade 11s.Goal:
I want to teach my students how to apply their new understanding to real physical situations and avoid plug’n’chug type questions. Read More...
October 19, 2018 Filed in: Articles
Eric Haller, Occasional Secondary School Teacher, Peel District School Board
In science, it’s always nice to be able to do a hands-on experiment. While there are many experiments you can do in class, there are some you can’t. Sometimes a particular experiment may require expensive equipment that you don’t have, may take too long to set up, may yield data that is too imprecise to analyze properly, or an experiment may be too dangerous for a classroom setting. At the latest annual OAPT conference Andrew Moffat showed us several websites with video libraries filled with experiments that I wouldn’t be able to recreate myself (skip to the end of this article for those links). To give you a taste of what kinds of videos are available, and how you might build a lesson around one of them for your students, I’d like to analyze one of my favourite videos from the collections. Read More...
September 17, 2017 Filed in: Articles
Nassi Rafiee, teacher Toronto DSB
Many grade 12 physics students plan to pursuit engineering in their post-secondary studies. Surprisingly, many lack a clear idea about the required skillset and what to expect in their next 4 years of education.
Last year I came up with the idea of having students design a mechanical pinball machine that demonstrates the mechanics concepts in grade 12. It was originally intended to focus on team building, engineering design process, physics calculations and writing skills, however as soon as I shared the idea with students, they got so excited that they formed their groups immediately and insisted that they wanted to build it too. Read More...
June 10, 2017 Filed in: Articles
Roberta Tevlin, Editor, OAPT Newsletter
Edited by Tim Langford
Projectile motion often involves a lot of mathematical problem-solving that is overly simplified and highly contrived. Football players do not stop to calculate the range before making a pass. Invading armies might want to make calculations for siege weapons, but these tend to be too complicated (trebuchets) or involve too much energy loss (catapults). Guess and check, was probably the preferred technique. Fortunately there is a cheap and reliable projectile launcher that you can use to show that physics works. Your students will be able to use it to hit a target on their first shot by using calculations for conservation of energy and projectile motion. Read More...
April 29, 2017 Filed in: Articles
A Practical Experiment For Learning Kinematics and Other STEM Concepts
Dr. Theresa Stotesbury, Research and Product Development, Trent University
I am part of a research group out of Trent University (Peterborough, Ontario) that has developed a teaching kit that provides a 60-minute problem-based experiment that is suitable for high school science students. The activity connects forensic science and kinematics through the analysis of blood spatter. I will be presenting the kit at the OAPT conference at 9:30 on Friday May 12th. Read More...
March 17, 2017 Filed in: Articles
Dave Doucette, OAPT Vice-President
While teaching uniform circular motion in high school, I struggled with developing the ac = v2
relationship in an intuitive and cognitively meaningful way. Geometric arguments do not resonate with students. They accept on faith but often with little interest or insight. Here is an approach that may do a better job. Read More...
January 20, 2017 Filed in: Articles
Ryan Thompson, OAPT Treasurer, Physics Teacher Newmarket HS
When the Growing Success
document came out in Ontario, the terms “Assessment as, for and of learning” were introduced. Even after teaching for 13 years, I still have to pause and stare into space as I try to differentiate between the three types. Time dilation is easier than that!
I believe in timely feedback and having direct involvement in each student’s success but I am also managing a schedule that is very limited on time (time dilation again!). As a result, I try to do what I can in the classroom
This article will be about one technique that helps me reconcile the Growing Success
document’s expectations, my own philosophy of teaching and limited time in the school day. This tool is called The Check Up and it helps the teacher get quick feedback about your past lesson. Read More...
December 11, 2016 Filed in: Articles
John Berrigan, Teacher Oakville Trafalger H.S.
In the previous article
we found the main factors that determine the thrust of a rocket engine. We rearranged the formula and determined the Impulse of the formula for rockets.
With Elon Musk discussing his Mars rocket last week, http://www.spacex.com/mars
, now is a good time to discuss how Impulse can be used to eventually determine the efficiency of a rocket engine. Read More...
October 02, 2016 Filed in: Articles
John Berrigan, Teacher Oakville Trafalger H.S.
In the previous article
we learnt how to find the largest possible delta-V that a rocket can experience. In this article, we are going to find the thrust of a rocket by using the fundamentals of conservation of momentum. This will be similar to what we did in the last article, however this time we will use variables instead specific masses and velocities. Furthermore, the cart is now a rocket, as this is rocket science! Read More...
September 02, 2016 Filed in: Articles
Michel Enns, Teacher Runnymede CI
I have been frustrated with gravitation simulators over the years because they stop working when the computers are updated. To avoid this, I have made one that is browser-based and will run on any device. You can find it at www3.sympatico.ca/michael.enns
. One non-standard thing that it can do is simulate the formation of a solar system with a thousand random masses. Read More...
February 20, 2016 Filed in: Demo Corner
Ryan Thompson, OAPT Treasurer, Physics Teacher, Newmarket HS
I purchased this little magnetic moon rover at Masterminds for $6 a few years ago because I thought it was cool. I didn’t have any specific ideas on how to utilize it until a few years later when I was teaching the famous river question to students. You know how it goes: Alice is crossing a river that has a velocity with respect to the shore of 4 m/s [East] and Alice swims with a velocity of 3 m/s [South] with respect to the water. If the river is 60 m wide, how long does it take Alice to get to the other side? The concept that is hard for students to reconcile is that even though Alice is being pushed to the right from the shores frame of reference, the amount of time to get to the other side is independent of the river’s velocity. This is when I had a Eureka moment. I grabbed the moon rover and put it on our whiteboard. I then wound it up and let it go south, just like Alice would. Read More...
January 01, 2000 Filed in: Demo Corner
Ed van den Berg and Rosea van den Berg, University of San Carlos, Talamban Campus, Cebu City, Philippines
This article was excerpted (with the authors’s permission) from a longer article in
The Physics Teacher (Sept. 1998, p.356-8).
What can we do to have clear and exciting lessons without a great amount of demonstration apparatus and hours of preparation each day? We present here a collection of small and quick demos that require no equipment beyond what is present in a classroom (chalk, chairs, students, books, paper, backpacks and their contents). Some are to prove something, but most are to illustrate, visualize, or simulate. These basic and well-tried ideas will stimulate students and revive the instructor who has spent a late night checking student papers. Have fun! Read More...