Sources of Light Cooperative Learning Activity

Idea- lightbulb ImageBy Varsha Patel, TDSB

Introduction

I chose to cover luminous sources using this cooperative learning activity (CL) as a way to make the topic more interesting and meaningful to the students. Students can be easily grouped according to the light source for which they are responsible, another reason why this activity works well. It is truly remarkable that once all the instructions (see Instructions sheet) were given out, the students were engaged — working quietly and attentively as they knew they all had roles to perform. Giving a time limit for the various parts of the activity ensured students maintained their level of readiness/involvement.

Click here to download the complete activity, including worksheets

 

Man Invents Machine To Convert Plastic Into Oil

The machine produced in various sizes, for both industrial and home uses, can easily transform a kilogram of plastic waste into a liter of oil, using about 1 kW·h of electricity but without emitting CO2 in the process. The machine uses a temperature controlling electric heater instead of flames, processing anything from polyethylene or polystyrene to polypropylene (numbers 2-4).  Comment: 1 kg of plastic produces one liter of oil, which costs $1.50. This process uses only about 1 kW·h of electricity, which costs less than 20 cents!