Visit Your Local PBS Station PBS Home PBS Home Programs A-Z TV Schedules Watch Video Donate Shop PBS Search PBS

TV Schedule
Alan Alda
For Educators
Previous Shows
Future Shows
Special Features

Show title


 
Teaching Guide
Educator Notes
Winging It
Make a Wind Tunnel
On the Wings of Insects
Quiz


ANSWERS

PART 2 - Operation

  1. Slowly flip the pages. What do you see? (animated picture of the flapping sequence)

QUESTIONS

  1. How many pairs of wings does a dragonfly have (two pairs)
  2. Do the right and left wing of the pair beat together? (Yes. For this flipbook the left and right wings go up and down together)
  3. Do both pairs have an upstroke that occurs at the same time? Explain. (No. The front wings go down when the rear ones go up. This is to avoid large up and down forces on the body, to balance out the vertical forces due to the front and back wings)

CRITICAL ANALYSIS

Why were three stacks of frames used instead of one? (So that two flap sequences could be seen with one flip, providing a longer time of viewing.)

SEQUENCING YOUR THOUGHTS

Suppose the frames were placed in the reverse sequence with #1 at the top. What would you see now? (The action would seem to go backwards, as occurs when running a videotape or movie backwards)

CURRICULUM LINKS
 Biology/Life Science:
 Wing Structure
 Physics:
 Motions and Forces

NATIONAL SCIENCE STANDARDS (Grades 5-8)
 Science As Inquiry-Content Standard A
 Students should develop abilities necessary to do scientific inquiry,
 Students should develop an understanding about scientific inquiry
 Physical Science -Content Standard B
 Students should develop an understanding of motions and forces
 Life Science -Content Standard C
 Student should develop an understanding of structure and function in living systems

return to show page

Back to Teaching Guide

 

 

Is it a Bird?The Eternal WingEyes in the SkyTaking to the AirFlapping FlyersWalkalong Glider Teaching guide Science hotline video trailer Resources Contact Search Homepage