Student Masters

OVERVIEW:

 Students will use a motion detector to learn about how sound waves can be used to "image" objects. They will use the motion probe connected to a computer-type interface to collect reflected sound data in real time to produce a graphical representation of their experimental seafloor. This method serves as a model for how "waves" can be used for non-intrusive imaging of objects. Examples - ultrasound, seismic mapping of the earth, radar imaging, NMR.

Graphs made using a motion detector can be used to study mapping of the topography of a model seafloor. A motion detector measures the distance to the nearest object in front of it by emitting and receiving pulses of ultrasound. A calculator can use distance and time measurements to produce a graph that represents surface features in much the same way that sonar does. In this experiment, you will use a TI Graphing Calculator, a LABPRO System, and a motion detector to produce graphs of seafloor.

In this experiment, students will:

• use a TI Graphing Calculator, a LABPRO System, and a motion detector to measure distance
• use a TI Graphing Calculator to produce a graph representing the seafloor
• analyze and interpret graphs 

National Standards

• Content Standard A - Understandings about Scientific Inquiry - Scientists rely on technology to enhance the gathering and manipulation of data.
• Content Standard C - Interaction of Energy and Matter - Waves, including sound and seismic waves, waves on water, and light waves have energy and can transfer energy when they interact with matter.
• Content Standard E - Understanding About Science and Technology