(#22) Machines
Your students will construct levers from a meter stick and a rubber stopper; pulleys from paper clips and thread; inclined planes from pieces of cardboard. They will use spring scales to weigh loads, measure effort, and thereby calculate efficiency. In each case they will find that machines save effort but never reduce work. They'll build a wheel and axle machine, examine gear ratios, even calculate the horsepower generated in climbing a flight of stairs. Imagine the smallest kid in your class winning a pulley tug-of-war against the strongest. Machines is great fun that your students will not easily forget.
(#22) MACHINES is part of our Self-Directing Task Card Series. It is an 48 page soft-bound book organized into three main parts:
INTRODUCTION
* A TOPS Model for Effective Science Teaching * Getting Ready * Gathering
Materials * Sequencing Task Cards * Long Range Objectives * Review / Test
Questions
TEACHING NOTES (16 lessons)
* Levers (1) * Work * Levers (2) * Paper Clip Pulley (1) * Paper Clip
Pulley (2) * Wheel Pulley * Combination Pulley * Inclined Plane (1) *
Inclined Plane (2) * What Kind of Machine? * What Kind of Lever? * Super
Pulley * Tug-of-War * Wheel and Axle * Spin Your Wheels! * Horsepower
REPRODUCIBLE LINE MASTERS
* 16 Open-Ended Task Cards * Protractor * Graph Paper
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(#22) MACHINES requires no lab equipment other than 200 gram spring scales and single wheel pulleys. Just photocopy the 16 task cards, gather simple materials (like meter sticks, rubber stoppers, baby food jars and paper clips), and you're ready to explore TOPS Learning Systems hands-on.
GRADE RANGE: 7-12
ORIGINS: written by Ron Marson / illustrated by Peg Marson / copyrighted
in 1989
by TOPS Learning Systems / ISBN 0-941008-99-1
ORDERING: Please print a copy of our order form, which lists all our titles. Use this form (or scratch paper) to track your ordering preferences as you browse our website.
#22 Machines @ $8.00
