Name _________________________________________ Date ____________
One way to estimate the distance from you to where lightning strikes is to count the number of seconds until you hear the thunder, and then divide by five. The number you get is the approximate distance in miles.
People are standing at the four points A, B, C and D. They saw lightning strike at point E. Because sound travels more slowly than light, they did not hear the thunder right away.
Who heard the thunder first? ___ Why?
Who heard it last? ___ Why?
The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Lightning Strikes Again ."
Measuring Up: Prototypes for Mathematics Assessment . Washington, DC: The National Academies Press,
Please select a format: