Benchmark Question: How are sounds made?
Focus Question: What causes sound?
The teacher will instruct
students to place their hands on their throats and make sounds. The class
will describe what they hear and feel. The teacher will record the
students’ observations on the board. Students will discuss what causes
sound vibrations. Students will use common instruments to observe different
Using a ruler, each student
will write a prediction about the relationship between the length of the
ruler and the pitch of the sound it will produce. Students will hold the
ruler over the edge of the desk. They will tap it lightly. They will listen
and observe. They will lengthen or shorten the amount of ruler hanging over
the desk and tap the desk lightly again. They will listen and observe again.
They will explain what the differences and the similarities in the sounds
are. Students will repeat this activity several times with varying lengths
and will record their data in a table. Each student will write a paragraph
explaining the relationship between the length of the ruler and the pitch
of the sound.