The transducer also converts signals from the machine into pulses of sound. Gel is commonly used when a person gets an ultrasound. The sound frequencies that are used could not pass through an air-body interface. The gel acts as a bridge between the machine and the person getting the ultrasound. To print out the Student Copy only, click here .
Procedure Complete the following activity sheet.
To print out the Activity Sheet only, click here . Brainstorm different reasons for having a sonogram. The following three images are sonograms at different stages of pregnancy. Put them in order from youngest fetus to oldest fetus. The following image is a three-dimensional sonogram.