physics of sound investigation 2, part 3
DESCRIPTION
Tension and Pitch. Physics of Sound Investigation 2, Part 3. Materials. Student sheet no. 11 called The Minigutbucket Student sheet no. 12 called The FOSS- ulele Large plastic bags Small nail Scissors Metric tape 2 Plastic cups 50 cm string 3 large paper clips Pencil 250 cm string - PowerPoint PPT PresentationTRANSCRIPT
Physics of SoundInvestigation 2, Part 3
Tension and Pitch
Materials
Student sheet no. 11 called The Minigutbucket Student sheet no. 12 called The FOSS-ulele Large plastic bags Small nail Scissors Metric tape 2 Plastic cups 50 cm string 3 large paper clips Pencil 250 cm string Masking tape
Minigutbucket (for teacher)
Insert string through hole in plastic cup.
Tie a knot at the end of the string.Tie the opposite end of the string
around a chair or table leg.
FOSS-ulele (for teacher)
Place a plastic cup upside down on a table.
Tie one end of the string to a table leg.
Feed the string through the plastic cup.
Tie a pencil to the other end of the string.
Introduction
What is tension? (A force pulling on an object in opposite directions.)
How does tension affect pitch?
Will find out by exploring 2 instruments.
Instruments
5 minutes to explore
Minigutbucket Demonstrate how attaches to a table leg. Show how to apply tension to the string by pulling
gently but firmly on the cup.
FOSS-ulele Demonstrate how to use the paper clip to affix the
string to a table let, bring the string across the cup on top of the table, and use the pencil like a handle to apply tension to the string.
Student sheets
Distribute
Read instructions
Record observations
Describe the methods used to change the pitch.
How did you change the tension of the strings on the 2 instruments?
What happened to the pitch of the sound produced by the string as you changed the tension o the strings?
Review
Tension – force applied to an object trying to pull it apart
What happens t the pitch when the tension on a sound source changes? (The greater the tension on a sound source, the higher the pitch.)
Science Story – Scoping out Sound
The End!!!