GEARS
Report
What are gears?
PURPOSE OF THE REPORT
In your Smore, you will include a written explanation of the purpose of your selected gear and how it works. Be sure to include images and videos to support your written explanation. Your report should also include important scientific terminology related to gears that w have learned about in class.
Types of Gears
SPUR GEAR
In spur gears, the teeth meet on a flat surface and can change the speed and direction of motion.
BEVEL GEAR
In bevel gears, two gears connect at an angle. Bevel gears are often cone-shaped. They can also change the
speed and direction of motion.
WORM GEAR
In worm gears, an axle or shaft has a screw thread that connects with another gear. This system is used to
reduce the speed and change the direction of motion.
RACK AND PINION GEAR
In rack and pinion gears, a single gear, called the pinion, meets with a toothed rack. The rack may slide or stay in one place. The system changes circular motion into motion in a straight line.
GEAR TRAIN
COMPOUND GEAR
REPORT
Step 1 : Start by introducing gears - definition, pictures, examples.
Step 2 : Select a gear used in everyday life to do your Smore on.
Step 3 : Explain how the gear system works for the example you selected in about 2-3 paragraphs. Make sure you use the important terminology for your explanation e.g. force, mechanical advantage, rotation, gear ratio, direction, speed, gear train, compound gears, input, output, motion etc.
Step 4 : Include a diagram of your selected gear. You may draw a diagram and upload its picture. Label the parts of the gear.
Step 5 : Use pictures or videos in your project to support your written work and help the reader understand.
Step 6 : Refer to the success criteria and suggestions by teachers and peers.
Step 7 : Let me know if you prefer an alternative way of presenting your understanding of gears.
SUCCESS CRITERIA FOR REPORT WRITING
- Includes titles with definitions.
- Use of proper terminology to explain the working of the chosen gear system.
- Use of correct spelling, punctuation and grammar.
- Ideas are organized into clear and well written paragraphs (include topic sentence, details/explanation and closing sentence)
- Use of pictures or videos to support the explanation.