fairfolio
Saved Projects

How Does Temperature Affect the Heart Rate of Crickets?

CSEF · 2002 Zoology

Alexandra L.E. Garcia · Agoura High School, Agoura Hills

Overview

Objectives/Goals To establish the relationship between temperature and the heart rate of crickets. Methods/Materials By gluing a rare-earth magnet to a cricket#s abdomen and using a Hal Effect Transducer (HET) capable of reading movement in the .5 micron range. The movement of the insect#s heartbeat was measured by observing voltage variations dependant on the distance between the magnet and the HET. The heartbeats were recorded by feeding the HET output voltage to the audio line-in input of a PC. To raise the temperature a heat lamp was used, and a thermometer recorded the change. Results For an increase of 4.4 C, the cricket#s heartbeats increased by 44%. Conclusions/Discussion The cricket#s heart rate went up with the environmental temperature. Perhaps the cricket#s circulatory system is also a cooling system in which blood must go through a heat-radiating element (possibly its wings).

Summary statement

The effect temperature has on the heart rate of a cricket.

Help received

My father helped me build the amplifier.

Awards (1)

  • Category Award

Competition history

  • CSEF 2002 Zoology · Entry S1907

Resources

Related projects

Closest projects by meaning, across every fair and year in the corpus.

Browse more like this

Source: California Science & Engineering Fair public projects

Save projects to your library

Sign in with Google to keep track of projects you find interesting, organized into folders. An account also raises your daily allowance for “Has this been done?”, and lets you create a key for the MCP server with a much higher limit than anonymous use. Browsing stays public.

Continue with Google