Cricket Thermometer

LAB: Cricket Thermometers

Name

Some folks claim that you can tell how hot it is outside by listening to the rhythm of chirping crickets. in this lab, you will listen to an audio tape recording of chirping crickets at different known temperatures, count the chirps, compare your count with others in your class, and graph the class results. The best straight line that you can draw through the data points will represent the relationship between temperature and how fast crickets chirp. Then you will listen to crickets chirping at an unknown temperature and use your graph to estimate the temperature. Listen to the audio tape carefully and count the chirps you hear from the time the teacher says start until she says stop fifteen seconds later. Record your result in the space provided and then be ready to share your data so that it can be averaged with your classmates data.

your data temp. ° F # chirps 54 65 68 79 82 89

class data temp. ° F # chirps 54 65 68 79 82 89

Graph of class data 50 45 • 40

35 30 25

20 - 1

C.,

10 0 40 i •

50

60

70

90

temperature in degrees Farenheit

Now listen to the "temperature unknown" tape and count the cricket chirps. Use your graph to estimate the temperature at which that many chirps per 15 seconds would be expected. Write your answers here: ° F. chirps = unknown #1 chirps = ° F. unknown #2 unknown #3

chirps =

CRICKET SCIENCE 1611 Shane Dr., Pocatello ID 83204 N Vuvu, C (CV i e on()

° F.

FAX & messages 1-208-232-5548