All Science Fair Projects

Over 500 FREE Science Fair Project Ideas!

Search Browse Forum Coach Links Editor Help Tell-a-Friend Encyclopedia Dictionary
Project title Comparing the effectiveness of ionizing and photoelectric smoke detectors Featured science projectScience project video
Difficulty Level Middle school
Project page  Click here to view this science project

Description
This science fair project was conducted to compare the performance of an ionizing smoke detector with a photoelectric smoke detector. The tests were done by placing a lighted cigarette at 200mm, 400mm, 600mm, 800mm and 1000mm from the smoke detectors, and comparing the speed of each detector in detecting the smoke emitted.  

Instructions preview
1. For this science fair project, the independent variable is the type of smoke detector used (photoelectric or ionizing) and the distance of the smoke detector from the source of the smoke. The dependent variable is the time taken for the smoke detector to trigger the alarm. This is determined by checking the time using a stopwatch. The constants (control variables) are the source of the smoke, the sensitivity of the smoke detectors and the temperature of the environment, which will remain at room temperature. 2. Purchase a photoelectric smoke detector, an ionizing smoke detector and 2 alarms. Connect .....
View our all-time most popular science projects
You might also like these projects
  1. Effect of extreme temperature on battery life
  2. How does the air pressure in a football helmet affect cushioning?
  3. The relationship between the firmness of a car's suspension system and the car's speed around bends
  4. Comparing incandescent lamps and LED lamps
  5. Comparing flat and dome shaped drain covers.
  6. How does packaging affect the carbonation of soft drinks
  7. Crosswinds and bridge stability
  8. How does the bow of a ship influence water resistance?
  9. Arches - how strong are they?
  10. Skateboard bearings
Search science fair projects Browse science fair projects
Kits for your science fair projectsScience fair bookScience kit search tool
Science kits, science lessons, science toys, maths toys, hobby kits, science games and books - these are some of many products that can help give your kid an edge in their science fair projects, and develop a tremendous interest in the study of science. When shopping for a science kit or other supplies, make sure that you carefully review the features and quality of the products. Compare prices by going to several online stores. Read product reviews online or refer to magazines.
Copyright (C) 2013 All Science Fair Projects.com. All Rights Reserved. Site
All Science Fair Projects Homepage
Search | Browse | Links | Handbook | From-our-Editor | Books | Help
Contact | Privacy | Disclaimer| Copyright notice